Recording apparatus, reproduction apparatus, data processing apparatus, recording and reproduction apparatus and data transmission apparatus and corresponding methods

ABSTRACT

An encryptor is provided for encrypting AV data sent from an interface. A controller controls recording of the encrypted AV data by controlling a recorder for recording the encrypted AV data in a magnetic disk. The recorder is controlled by the controller so as to reproduce the data recorded on the disk. A decrypter decrypts the reproduced data that is sent to the interface.

This Application is a Continuation of U.S. patent application Ser. No.10/169,052, filed Nov. 4, 2002, which is a U.S. National PhaseApplication of PCT International Application PCT/JP00/09260, theContents of which are Incorporated by Reference.

TECHNICAL FIELD

The present invention relates to a recording apparatus for recordingdata, a reproduction apparatus for reproducing data, a data processingapparatus for moving or copying data that is recorded in a recordingmedium into another apparatus, a recording and reproduction apparatusfor recording and reproducing data that is moved in such a manner, adata transmission apparatus for transmitting a stream formed of aplurality of pieces of data and a recording apparatus as well as arecording and reproduction apparatus for reproducing, with a time shift,the contents that are broadcast via TV broadcasting, and correspondingmethods or the like, so as to be viewed after being delayed apredetermined period of time.

BACKGROUND TECHNOLOGY

It is necessary to protect a copyright in the case of dealing with data,for which copyright protection is necessary, such as a new movie, a TVprogram or music of a fee charging broadcast. As an effective method ofprotecting a copyright, there is the method of limiting the utilizationof data by encrypting the data of which the copyright requiresprotection.

For example, at the time of the transmission of audio and visual data(hereinafter denoted as AV data), in the case that copyright protectionis necessary for the AV data, the AV data is encrypted before beingtransmitted. As an example of the above, IEEE1394-DTCP (digitaltransmission protection) system has become a standard.

IEEE1394 allows data to be synchronously transmitted by means of a fastbus system that carries out a serial transmission and, therefore, it ispossible to transmit AV data, or the like, in real time. This IEEE1394system is being installed in a variety of digital audio and visualequipment, including household digital AV equipment as an externalinterface.

According to the IEEE1394-DTCP system, a certification function and thefunction of the nullification of a key are provided at the time of datatransmission via an IEEE1394 bus so that the copyright protection can berealized by encrypting data for which copyright protection is necessary,such as AV data before being transmitted.

Now, together with the spread and development of personal computers, alarge number of recording apparatuses or reproduction apparatuses, suchas a hard disk apparatus, have come into use, due to their large storagecapacity and due to their high speed of access, as external memoryapparatuses. Furthermore, hard disk apparatuses have recently come intouse not only in computers but also in digital AV equipment, or the like,where video and sound are recorded and reproduced by applying digitaltechnology so as to make use of their high speed of access and theirlarge storage capacity.

Accordingly, there have been cases where a creator of a movie, and thelike, consider that a third party should not be allowed to freely makecopies of data prepared by themselves. Therefore, there exists data thatis prohibited from being copied in another recording medium and thereexists data that is allowed to be copied only one time in order toprotect the copyright thereof.

In the case that such data is stored in, for example, an HDD by beingcopied, the data is reproduced by using only the HDD.

In addition, as one way of viewing a TV broadcast that has beenconventionally widely used, a program (content) that has been broadcastis temporarily recorded in a recording apparatus, such as a VTR, so thatthe recorded data is reproduced at a later time and, thereby, theprogram is viewed at a time different from its original broadcast time.

In particular, in the case that a recording medium such as a hard diskwhere a random access is possible and where recording and reproductionare possible at the same time is used for a recording apparatus, a timeshift reproduction, according to a narrow definition, can be implementedin a manner such that the content of a program can be viewed in sequencewithout any portion being missed even after being delayed for only ashort period of time during the broadcasting time of the program incomparison with a VTR wherein a conventional tape medium is used.

FIG. 43 is a configuration diagram of a recording and reproductionapparatus for implementing a time shift reproduction according to theprior art. As shown in the figure, a recording and reproduction means2120 is a means of recording and reproducing broadcasts inputted fromthe outside, a recording medium 2130 is a means of storing data ofbroadcasts that can be implemented by a hard disk, or the like, aswitching means 2160 is a means of receiving inputs from the recordingand reproduction means 2120 and inputs of broadcasts from the outsideand for selecting any of them which is then outputted to an externalmonitor, or the like.

An example of the operation of a recording and reproduction apparatusaccording to the prior art that has such a configuration is described inthe following.

First, in the case that a viewer is viewing a program in real time, theswitching means 2160 carries out a setting such that the broadcastinputted from the outside is outputted to the monitor without changewhile the recording and reproduction means 2120 records the same programcontent in the recording medium 2130.

Next, in the case that the viewer returns again to a position in frontof the monitor so as to restart viewing of the program after temporarilyleaving the position in front of the monitor, the recording andreproduction means 2120 reproduces the recorded data from the point intime when the viewer left the position in front of the monitor while theswitching means 2160 carries out the setting such that input from therecording and reproduction means 2120 is outputted to the monitor. Afterthis, the viewer views the reproduction output from the recording andreproduction means 2120 as the program.

In the above described operation, the recording and reproduction means2120 reproduces data while carrying out the recording of the broadcastinputted from the outside in a parallel manner. That is to say, therecording and reproduction means 2120 simultaneously carries out thereproduction and the recording of the data.

Thereby, even in the case that the viewer has to temporarily interruptthe viewing of a real time broadcast program, it becomes possible toview and to follow the content of the program without a gap, with adelay in accordance with the period of time, only, of interruption ofviewing.

In the same manner as in the case of the transmission of AV data,however, a system for copyright protection is necessary in the case thatAV data that requires copyright protection is recorded in and/orreproduced from a recording medium, such as a hard disk apparatus. Howthe copyright is protected, however, is not concretely determined in thecase that AV data that requires copyright protection is recorded inand/or reproduced from a recording apparatus and/or reproductionapparatus.

In addition, in some cases copyright protection is required, in the samemanner as for AV data, for document data sent via the Internet, or thelike, and for computer programs, such as game software, in addition toAV data. How the copyright is protected, however, is not concretelydetermined in the case that the above described data that requirescopyright protection is recorded in and/or reproduced from a recordingapparatus and/or reproduction apparatus.

That is to say, there is a problem wherein there is no concrete systemthat protects the copyright in the case that AV data, document data ordata such as computer programs are recorded in a recording apparatusand/or in the case that these types of data are reproduced in areproduction apparatus.

In addition, when the remaining capacity for data recording in the abovedescribed HDD becomes small, it becomes necessary to overwrite new dataon the data recorded in the HDD or to increase the remaining capacity byeliminating a portion of data that is recorded in the HDD. However, theuser of the HDD considers that overwriting the data that is recorded inthe HDD or the elimination of the data is not desirable and, in somecases, the user considers it desirable to copy the data recorded in theHDD in another recording medium.

On the other hand, as described above, the copyright holder isnegatively affected when the data recorded in the HDD is copied byignoring the copyright.

That is to say, in the case that data, for which copyright protection isnecessary, is recorded in a recording apparatus such as an HDD, there isa problem that the user cannot copy the data to another recordingmedium.

In addition, the problem of copyright is taken into consideration withrespect to broadcast programs together with the verification ofbroadcast type such as cable TV or a CS broadcast and digitalization ofsignals and broadcasts of programs are implemented, wherein recordingfor copying is set to be impossible in advance by including a copy guardin signals.

In a conventional recording and reproduction apparatus, however, aproblem arises in that there is a risk that the recording of a programin the recording medium 2130 in order to implement a time shiftreproduction causes an infringement of the copyright with respect to theprogram, when the copyright is taken into consideration as describedabove.

That is to say, a problem arises in that there is a risk that aninfringement of the copyright with respect to a program, for whichcopyright protection is necessary, may be caused in the case that a timeshift reproduction of the program is implemented.

As for measures for avoiding such a problem, methods of (1) limiting thetimes when time shifting is possible, (2) preventing the content that isbroadcast from being stored in a complete form have been considered, andso on.

DISCLOSURE OF THE INVENTION

The present invention is provided by taking the above described problemsinto consideration and a purpose thereof is to provide a recordingapparatus, a reproduction apparatus and corresponding methods that canprotect the copyright in the case where data for which copyrightprotection is necessary is recorded, and/or in the case where data forwhich copyright protection is necessary is reproduced.

In addition, the present invention is provided by taking the aboveproblems into consideration and a purpose thereof is to provide a dataprocessing apparatus and method for moving or for copying data, which isprohibited from being copied so as to protect the copyright, to anotherrecording medium, a recording and reproduction apparatus for recordingor reproducing, while recording, data from the above data processingapparatus in a recording medium, an encrypted data decryption recordingapparatus system for backing up data while protecting the copyright anda decryption recording apparatus and a recording apparatus for formingthe above system as well as a data transmission apparatus fortransmitting data while protecting the copyright.

In addition, the present invention is provided by taking the abovedescribed problems into consideration and a purpose thereof to provide arecording apparatus, a recording and reproduction apparatus andcorresponding methods wherein it is possible to avoid copyrightinfringement in a time shift reproduction for viewing a program with adelay relative to its original broadcast time.

To solve the above problems, one aspect of the present invention is arecording apparatus characterized by comprising:

an encryption means of encrypting data sent from an interface;

a control means of controlling said encrypted data to be recorded; and

a recording means controlled by said control means of recording saidencrypted data on a disk.

Another aspect of the present invention is a recording apparatus,characterized in that said encryption means encrypts said data by usinga device unique key that is a numeric value and/or a symbol allocatedto, and specific to, said recording apparatus.

Still another aspect of the present invention is a recording apparatus,characterized in that said encryption means encrypts said data by usingrecording unit information that is a numeral and/or a symbol specific toa recording block corresponding to a recording unit that is a minimumunit for said control means to sequentially access said recording means.

Yet still another aspect of the present invention is a recordingapparatus, characterized in that the encryption of said data by usingsaid recording unit information indicates the encryption of said data byusing a key gained based on said recording unit information.

Still yet another aspect of the present invention is a recordingapparatus, characterized in that at least said encrypted data recordedin said recording block and additional information added to saidencrypted data are encrypted in the entire portion and are recorded insaid recording means.

A further aspect of the present invention is a recording apparatus,characterized in that:

copy permission information is added to said data;

said control means controls said recording means to record said copypermission information;

said encryption means generates first information that includes at leasteither said device unique key or said copy permission information;

said encryption means generates, by using said recording unitinformation, a content key that is information gained by encrypting saidfirst information;

said encryption means encrypts said data by using said content key; and

said control means controls said recording means to record saidencrypted data.

A still further aspect of the present invention is a recordingapparatus, characterized in that:

a title key that is a numeric value and/or a symbol specific to saiddata is allocated to said data;

said encryption means encrypts said title key by using said deviceunique key; and

said control means controls said recording means so that said encryptedtitle key is recorded in said recording means.

A yet further aspect of the present invention is a recording apparatus,characterized in that said encryption means encrypts said data by usingsaid title key.

A still yet further aspect of the present invention is a recordingapparatus, characterized in that:

said encryption means encrypts said title key by using said deviceunique key;

said control means controls said recording means to record saidencrypted title key;

said encryption means generates third information that includes saidtitle key;

said encryption means generates a content key, which is informationgained by encrypting said third information, by using recording unitinformation that is a numeral and/or a symbol specific to a recordingblock based on a recording unit that is a minimum unit for said controlmeans to sequentially access said recording means;

said encryption means encrypts said data by using said content key; and

said control means controls said recording means to record saidencrypted data.

An additional aspect of the present invention is a recording apparatus,characterized in that:

copy permission information is added to said data; and

said encryption means encrypts said data by using said copy permissioninformation.

A still additional aspect of the present invention is a recordingapparatus, characterized in that:

said encryption means encrypts said title key by using said deviceunique key:

said control means controls said recording means to record saidencrypted title key;

said control means controls said recording means to record said copypermission information;

said encryption means generates second information that includes atleast either the said title key or said copy permission information;

said encryption means generates a content key that is information gainedby encrypting said second information by using recording unitinformation that is a numeral and/or a symbol specific to a recordingblock based on a recording unit that is a minimum unit for said controlmeans to sequentially access said recording means;

said encryption means encrypts said data by using said content key; and

said control means controls said recording means to record saidencrypted data.

A yet additional aspect of the present invention is a recordingapparatus, characterized in that:

said encryption means encrypts data sent from the interface to whichcopy permission information is attached by using said copy permissioninformation; and

said control means controls said recording means to record said copypermission information before and/or after said recording means recordssaid data.

A still yet additional aspect of the present invention is a recordingapparatus, characterized in that said control means controls saidrecording means to record said copy permission information before, atleast, said recording means records said data.

A supplementary aspect of the present invention is a recordingapparatus, characterized in that said control means controls saidrecording means to record said copy permission information only aftersaid recording means records said data.

A still supplementary aspect of the present invention is a recordingapparatus characterized by comprising:

a control means of controlling encrypted data sent from an interface tobe recorded; and

a recording means, that is controlled by said control means, ofrecording said encrypted data on a disk.

A yet supplementary aspect of the present invention is a reproductionapparatus characterized by comprising:

a control means of controlling encrypted data recorded on a disk bymeans of a recording apparatus to be reproduced;

a reproduction means, which is controlled by said control means, ofreproducing said data; and

a decryption means of decrypting said reproduced data that is sent tothe interface.

A still yet supplementary aspect of the present invention is areproduction apparatus characterized by comprising:

a control means of controlling encrypted data recorded on a disk bymeans of a recording apparatus to be reproduced;

a reproduction means, that is controlled by said control means, ofreproducing said data; and

a decryption means of decrypting said reproduced data that is sent tothe interface, wherein said decryption means decrypts said reproduceddata by using said device unique key.

One aspect of the present invention is a reproduction apparatuscharacterized by comprising:

a control means of controlling encrypted data recorded on a disk bymeans of a recording apparatus to be reproduced;

a reproduction means, that is controlled by said control means, ofreproducing said data; and

a decryption means of decrypting said reproduced data that is sent tothe interface, wherein said decryption means decrypts said reproduceddata by using said recording unit information.

Another aspect of the present invention is a reproduction apparatuscharacterized by comprising:

a control means of controlling encrypted data recorded on a disk bymeans of a recording apparatus to be reproduced;

a reproduction means, that is controlled by said control means, ofreproducing said data; and

a decryption means of decrypting said reproduced data that is sent tothe interface, wherein said decryption means decrypts said reproduceddata by using a key gained based on said recording unit information.

Still another aspect of the present invention is a reproductionapparatus characterized by comprising:

a control means of controlling encrypted data recorded on a disk bymeans of a recording apparatus to be reproduced;

a reproduction means, which is controlled by said control means, ofreproducing said data; and

a decryption means of decrypting said reproduced data that is sent tothe interface, wherein said decryption means attempts to decrypt theentirety of, or a portion of, said encrypted data by assuming that saidcopy permission information has a variety of values in the case thatsaid copy permission information cannot be recorded in a normal mannerin said recording means at the time when said data is recorded, andwherein said reproduced data is decrypted by using the value of saidcopy permission information in the case that said reproduced data can bedecrypted in a normal manner as a result of said attempts.

Yet still another aspect of the present invention is a reproductionapparatus characterized by comprising:

a control means of controlling encrypted data recorded on a disk bymeans of a recording apparatus; and

a reproduction means, which is controlled by said control means, ofreproducing said data,

wherein said reproduced data is sent to the interface.

Still yet another aspect of the present invention is a recordingapparatus, characterized in that said interface, said encryption meansand said control means are integrated and provided on the same printedcircuit board.

A further aspect of the present invention is a recording apparatus,characterized in that said interface, said encryption means and saidcontrol means are integrated in one chip.

A still further aspect of the present invention is a reproductionapparatus, characterized in that said interface, said decryption meansand said control means are integrated and provided on the same printedcircuit board.

A yet further aspect of the present invention is a reproductionapparatus, characterized in that said interface, said decryption meansand said control means are integrated in one chip.

A still yet further aspect of the present invention is a recordingapparatus, characterized in that a signal detected from a terminal onsaid printed circuit board that outputs a signal that can be reproducedas data by a third party is entirely encrypted and/or is inscribed in anundisclosed format.

An additional aspect of the present invention is a reproductionapparatus, characterized in that a signal detected from a terminal onsaid printed circuit board that outputs a signal that can be reproducedas data by a third party is entirely encrypted and/or is inscribed in anundisclosed format.

A still additional aspect of the present invention is a recordingapparatus, characterized in that the property of a terminal on saidprinted circuit board that outputs a signal that can be reproduced asdata by a third party is defined according to an undisclosed format.

A yet additional aspect of the present invention is a reproductionapparatus, characterized in that the property of a terminal on saidprinted circuit board that outputs a signal that can be reproduced asdata by a third party is defined according to an undisclosed format.

A still yet additional aspect of the present invention is a recordingapparatus, characterized in that said device unique key cannot beaccessed by an external device.

A supplementary aspect of the present invention is a recordingapparatus, characterized in that said copy permission information isrecorded in a system region that cannot be directly accessed by a userof said recording means.

A still supplementary aspect of the present invention is a recordingapparatus, characterized in that:

copy permission information is added to the data sent from saidinterface; and

said control means can control said recording means to record said dataeven in the case that said copy permission information of said datarepresents “Copy Never” according to a predetermined condition.

A yet supplementary aspect of the present invention is a recordingapparatus, characterized in that said predetermined condition is thecase wherein said recorded data becomes unreproducible after apredetermined period of time.

A still yet supplementary aspect of the present invention is a recordingapparatus, characterized in that said predetermined condition is thecase wherein said recorded data becomes unreproducible according to feeimposition conditions.

One aspect of the invention is a reproduction apparatus, characterizedin that:

copy permission information is added to said encrypted data that isrecorded: and said control means controls said reproduction means toreproduce said data at least one time in the case that said copypermission information of said data represents “Copy Never” according toa predetermined condition.

Another aspect of the present invention is a reproduction apparatus,characterized in that said predetermined condition is the case whereinsaid recorded data becomes unreproducible after a predetermined periodof time.

Still another aspect of the present invention is a reproductionapparatus, characterized in that said predetermined condition is thecase wherein said recorded data becomes unreproducible according of feeimposition conditions.

Yet still another aspect of the present invention is a reproductionapparatus, characterized in that:

copy permission information is added to said encrypted data that isrecorded; and

said control means controls said reproduction means to copy and tooutput said data only once so as to allow said copy permissioninformation of said data, after being once copied by means of saidrecording means, to permit copying only one additional time (copy once)in the case that said copy permission information of said datarepresents the permission of copying only one (copy once) according to apredetermined condition.

Still yet another aspect of the present invention is a reproductionapparatus, characterized in that said predetermined condition is thecase wherein said data or the key used for encrypting said data areerased after a predetermined period of time has elapsed since saidreproduction means has copied and outputted said data.

A further aspect of the present invention is a reproduction apparatus,characterized in that said predetermined condition is the case wherein arecorder of said data that has been only once copied and outputted is anapparatus for recording said data as a backup.

A still further aspect of the present invention is a reproductionapparatus, characterized in that said data recorded as a backup in saidrecorder is unreproducible from said recorder.

A yet further aspect of the present invention is a reproductionapparatus, characterized in that said data recorded as a backup in saidrecorder is unreproducible unless said data is returned to the originalreproduction apparatus.

A still yet further aspect of the present invention is a recordingapparatus characterized in that said encryption means encrypts dataregardless of the value of the copy permission information of said datasent from said interface.

An additional aspect of the present invention is a recording apparatuscharacterized in that:

said encryption means does not encrypt said data in the case that copypermission information of the data sent from said interface representsthat the data can be freely copied (copy free); and

said control means controls said recording means to record saidunencrypted data.

A still additional aspect of the present invention is a data processingapparatus comprising at least a move means of moving data that isrecorded in a recording medium for recording data to another recordingapparatus, characterized in that, in the case that data that isattempted to be moved by said move means is copy prohibited dataprohibited from being copied, the copy prohibited data is encrypted byusing an encryption key specific to said data processing apparatus whenat least being outputted from said data processing apparatus.

A yet additional aspect of the present invention is a data processingapparatus comprising at least a copying means of copying data that isrecorded on a recording medium for recording data into another recordingapparatus, characterized in that, in the case that data that isattempted to be copied by said copying means is copy permissioninformation that is prohibited from being copied, the copy prohibiteddata is encrypted by using an encryption key specific to said dataprocessing apparatus when at least being outputted from said dataprocessing apparatus.

A still yet additional aspect of the present invention is a dataprocessing apparatus, characterized by further comprising an encryptionmeans of encrypting said copy prohibited data by using said encryptionkey.

A supplementary aspect of the present invention is a data processingapparatus, characterized by further comprising a reproduction means ofdecryption, by using said encryption key, said copy prohibited dataencrypted using said encryption key and of reproducing said copyprohibited data.

A still supplementary aspect of the present invention is a dataprocessing apparatus, characterized in that:

said reproduction means is a means of reproducing said copy prohibiteddata at a rate required at the time of viewing and listening by theuser;

a storage means of storing said copy prohibited data that has beentransmitted at a rate faster than said rate that is required at the timeof viewing and listening by the user in the case that said copyprohibited data encrypted using said encryption key is transmitted at arate faster than said rate required at the time of viewing and listeningby the user from said other recording apparatus is provided; and

said reproduction means can reproduce said copy prohibited data storedin said storage means or data stored in said storage means in advance atthe time when said storage means stores said copy prohibited data fromsaid other recording apparatus.

A yet supplementary aspect of the present invention is a data processingapparatus, characterized in that:

said other recording apparatus is an apparatus that can record data in asecond recording medium;

a judgment means of judging whether or not said second recording mediumis a recording medium corresponding to said data processing apparatus isfurther provided; and

said move means or said copying means moves or copies said copyprohibited data in the case that said second recording medium is judgedto be a recording medium corresponding to said data processing apparatusby said judgment means.

A still yet supplementary aspect of the present invention is a dataprocessing apparatus, characterized in that:

said other recording apparatus is an apparatus that can record data in asecond recording medium;

a judgment means of judging whether or not said other recordingapparatus is an apparatus corresponding to said data processingapparatus is further provided; and

said move means or said copying means moves or copies said copyprohibited data in the case that said other recording apparatus is anapparatus corresponding to said data processing apparatus by saidjudgment means.

One aspect of the present invention is a data processing apparatus,characterized in that said move means or said copying means outputs saidcopy prohibited data as data that can be copied only once when said copyprohibited data is moved or is copied.

Another aspect of the present invention is a recording and reproductionapparatus, characterized by comprising a recording means of recordingsaid copy prohibited data that is encrypted using said encryption keyfrom a data processing apparatus in a second recording medium.

Still another aspect of the present invention is a recording andreproduction apparatus, characterized by comprising:

a recording means of recording said copy prohibited data that isencrypted using said encryption key from a data processing apparatus ina second recording medium; and

a transmission means of transmitting said copy prohibited data that isrecorded in said second recording medium and that is encrypted usingsaid encryption key to said data processing apparatus while stillencrypted using said encryption key.

Yet still another aspect of the present invention is a recording andreproduction apparatus, characterized by comprising:

a recording means of recording said copy prohibited data that isencrypted using said encryption key from a data processing apparatus insaid second recording medium; and

a transmission means of transmitting said copy prohibited data that isrecorded in said second recording medium and that is encrypted usingsaid encryption key to said data processing apparatus while stillencrypted using said encryption key.

Still yet another aspect of the present invention is a recording andreproduction apparatus, characterized by comprising:

a recording means of recording said copy prohibited data encrypted usingsaid encryption key from a data processing apparatus in a secondrecording medium; and

a decryption and reproduction means of decrypting, by using saidencryption key, said copy prohibited data that is recorded in saidsecond recording medium and that is encrypted using said encryption keyand of reproducing said copy prohibited data.

A further aspect of the present invention is a recording andreproduction apparatus, characterized by further comprising:

a key reproduction means of reproducing an encrypted key recordingmedium wherein said encryption key is recorded; and

a key storage means of storing said encryption key reproduced by saidkey reproduction means,

wherein said decryption and reproduction means reproduces said copyprohibited data by utilizing said encryption key stored by said keystorage means.

A still further aspect of the present invention is a recording andreproduction apparatus, characterized by further comprising a receptionmeans of receiving said encryption key that is transmitted from saiddata processing apparatus,

wherein said decryption and reproduction means reproduces said copyprohibited data by utilizing said encryption key received by saidreception means.

A yet further aspect of the present invention is a data processingapparatus, characterized by comprising at least a move means of movingdata that is recorded in a recording medium for recording data toanother recording apparatus as data in a format that can be decrypted inthe other recording apparatus,

wherein data that is attempted to be moved by said move means is copyprohibited data that is prohibited from being copied.

A still yet further aspect of the present invention is a data processingapparatus, characterized by comprising at least a copying means ofcopying data that is recorded in a recording medium for recording datain another recording apparatus as data in a format that can be decryptedin the other recording apparatus,

wherein data that is attempted to be copied by said copying means iscopy prohibited data that is prohibited from being copied.

An additional aspect of the present invention is a data processingapparatus, characterized in that the data in a format that can bedecrypted in said other recording apparatus means plain sentence data,data that is encrypted using a key specific to said other recordingapparatus or data that is encrypted using a key attached to a secondrecording medium in said other recording apparatus.

A still additional aspect of the present invention is a data processingapparatus, characterized in that the data in a format that can bedecrypted in said other recording apparatus is also data in a formatused in said other recording apparatus.

A yet additional aspect of the present invention is a processingapparatus, characterized in that:

said other recording apparatus is an apparatus that can record data insaid recording medium;

a judgment means of judging whether or not said second recording mediumcorresponds to said data processing apparatus is further provided; and

said move means or said copying means moves or copies said copyprohibited data in the case that said second recording medium is judgedto be a recording medium corresponding to said data processing apparatusaccording to said judgment means.

A still yet additional aspect of the present invention is a dataprocessing apparatus, characterized in that:

said judgment means carries out said judgment by using said key in thecase that a key indicating that said second recording medium is arecording medium corresponding to said data processing apparatus isattached to said second recording medium;

an encryption means of encrypting said copy prohibited data by usingsaid key in the case that said second recording medium is judged to be arecording medium corresponding to said data processing apparatus by saidjudgment means is further provided; and

said move means or said copying means moves or copies said encryptedcopy prohibited data.

A supplementary aspect of the present invention is a data processingapparatus, characterized in that:

said other recording apparatus is an apparatus that can record data in asecond recording medium;

a judgment means of judging whether or not said other recordingapparatus is an apparatus corresponding to said data processingapparatus is further provided; and

said move means or said copying means moves or copies said copyprohibited data in the case that said other recording apparatus isjudged to be an apparatus corresponding to said data processingapparatus by said judgment means.

A still supplementary aspect of the present invention is a dataprocessing apparatus, characterized in that:

in the case that said judgment means has a key that indicates that saidother recording apparatus is an apparatus corresponding to said dataprocessing apparatus, said judgment means carries out said judgment byusing said key;

an encryption means of encrypting said copy prohibited data by usingsaid key, in the case that said other recording apparatus is judged tobe an apparatus corresponding to said data processing apparatus by saidjudgment means, is further provided; and

said move means or said copying means moves or copies said encryptedcopy prohibited data.

A yet supplementary aspect of the present invention is a data processingapparatus, characterized in that said move means or said copying meansoutputs said copy prohibited data as data that can be copied only oncewhen said copy prohibited data is moved or copied.

A still yet supplementary aspect of the present invention is a recordingand reproduction apparatus for recording said copy prohibited data, froma data processing apparatus, in a second recording medium and forreproducing said copy prohibited data from said second recording medium,wherein said copy prohibited data is plain sentence data, and

wherein said recording and reproduction apparatus is characterized bycomprising:

an encryption means of encrypting said copy prohibited data by using anencryption key attached to said second recording medium or by using anencryption key specific to said recording and reproduction apparatus;

a recording means of recording said copy prohibited data encrypted bysaid encryption means in said second recording medium; and

a reproduction means of decrypting said encrypted copy prohibited datathat is recorded in said second recording medium by utilizing said keyso as to reproduce said copy prohibited data.

One aspect of the present invention is a recording and reproductionapparatus for recording said copy prohibited data, from a dataprocessing apparatus, in a second recording medium and for reproducingsaid copy prohibited data from said second recording medium,

wherein said copy prohibited data is data encrypted by a key specific tosaid recording and reproduction apparatus or data encrypted by using akey attached to said second recording medium,

wherein said recording and reproduction apparatus is characterized bycomprising:

a recording means of recording said encrypted copy prohibited data insaid second recording medium; and

a reproduction means of decrypting said encrypted copy prohibited datathat is recorded in said second recording medium by utilizing said keyso as to reproduce said copy prohibited data.

Another aspect of the present invention is a data processing apparatus,characterized by further comprising a fee imposition informationtransmission means of transmitting fee imposition information withrespect to move or copying of said data to a management apparatus formanaging said data processing apparatus when said move means carries outthe move of said data or when said copying means carries out the copyingof said data.

Still another aspect of the present invention is a data processingapparatus, characterized in that said move means moves said copyprohibited data to, or said copying means copies said copy prohibiteddata into, said other recording apparatus when at least a managementapparatus, which has the ability of imposing a fee on the move or on thecopying of said copy prohibited data, is confirmed to be connected to aninterface to which said data processing apparatus and said otherrecording apparatus are connected.

Yet still another aspect of the present invention is an encrypted datadecrypting and recording apparatus system characterized by comprising:

a plurality of recording apparatuses that respectively record encryptedcopy prohibited data, of which the content is identical, that isprohibited from being copied; and

a decrypting and recording apparatus having a decryption means ofdecrypting said encrypted copy prohibited data that is outputted fromsaid plurality of recording apparatuses and a recording means ofrecording encrypted, or unencrypted, copy prohibited data, of which thecontent is identical to said copy prohibited data.

Still yet another aspect of the present invention is a decrypting andrecording apparatus, characterized by comprising:

a decryption means of decrypting encrypted copy prohibited data, whichis prohibited from being copied and which is outputted from a pluralityof recording apparatuses in which said encrypted copy prohibited data,of which the content is identical, is respectively recorded; and

a recording means of recording encrypted, or unencrypted, copyprohibited data, of which the content is identical to that of said copyprohibited data.

A further aspect of the present invention is a recording apparatus,characterized by being one of a plurality of recording apparatuses thatrespectively record encrypted copy prohibited data, of which the contentis identical, that is prohibited from being copied,

wherein said recording apparatus comprises a recording means ofrecording said encrypted copy prohibited data and an output means ofoutputting said encrypted copy prohibited data that is recorded in saidrecording means, and

wherein said encrypted copy prohibited data outputted from said outputmeans is data that can only be decrypted in a decrypting and recordingapparatus having at least a decryption means of decrypting saidencrypted copy prohibited data.

A still further aspect of the present invention is a data transmissionapparatus characterized by comprising a transmission means oftransmitting a stream formed of a plurality of pieces of data,

wherein each of said pieces of data in said stream, or within each ofblocks forming said stream, is data that cannot be reproduced unless thepiece of data chronologically positioned one position before said datais reproduced, and

wherein said transmission means transmits each piece of said data, ofdata in said stream, or each of the blocks forming said stream, in theorder of from the rear toward the head in a chronological manner.

A yet further aspect of the present invention is a recording apparatusfor allowing copy restricted content, comprising data that is set so asto be prohibited from, or restricted from, being copied, to becomereproducible in a time shift manner, characterized by comprising:

a recording medium wherein a predetermined capacity of recording of saidcopy restricted content is possible; and

a recording means of recording data in said recording medium,

wherein said recording means records said copy restricted content insaid recording medium and allows data of said copy restricted contentrecorded in said recording medium to convert to the condition whereinviewing and listening is impossible after a predetermined period of timehas elapsed since the time the recording of said copy restricted contenthas started.

A still yet further aspect of the present invention is a recordingapparatus, characterized in that said condition wherein viewing andlistening is impossible is implemented by erasing the data of said copyrestricted content.

An additional aspect of the present invention is a recording apparatus,characterized in that said condition wherein viewing and listening isimpossible is implemented by not erasing the data of said copyrestricted content.

A still additional aspect of the present invention is a recordingapparatus, characterized in that said condition wherein viewing andlistening is impossible is implemented by allowing the data of said copyrestricted content to become unreproducible.

A yet additional aspect of the present invention is a recordingapparatus, characterized in that said condition wherein viewing andlistening is impossible is implemented by encrypting the data of saidcopy restricted content after reproduction.

A still yet additional aspect of the present invention is a recordingapparatus, characterized in that the timing according to which saidrecording means starts the recording of said copy restricted content isdefined by referring to judgment information in conjunction with saidcopy restricted content.

A supplementary aspect of the present invention is a recordingapparatus, characterized in that said recording means carries outrecording by differentiating said copy restricted content from othercontent by using said judgment information.

A still supplementary aspect of the present invention is a recordingapparatus, characterized in that said judgment information is copyrightinformation included in a data column of said copy restricted content.

A yet supplementary aspect of the present invention is a recordingapparatus, characterized in that the timing according to which saidrecording means starts the recording of said copy restricted content isdefined based on an input from the outside.

A still yet supplementary aspect of the present invention is a recordingapparatus, characterized in that said recording medium has a recordingbuffer for temporarily recording said copy restricted content.

One aspect of the present invention is a recording apparatus,characterized in that said recording buffer is a ring buffer wherein itis possible to record a constant amount of data by repeating overwritingrecording in the same region.

Another aspect of the present invention is a recording and reproductionapparatus characterized by comprising:

a recording apparatus; and

a reproduction means of reproducing data recorded in said recordingmedium,

wherein said reproduction means reproduces said copy restricted contentthat has been recorded after a predetermined period of standby time haselapsed since the time of the start of the recording of said copyrestricted content.

Still another aspect of the present invention is a recording andreproduction apparatus characterized by comprising:

a recording apparatus; and

a reproduction means of reproducing data recorded in said recordingmedium,

wherein said reproduction means reproduces said copy restricted contentthat has been recorded after a predetermined period of standby time haselapsed since the time of the start of the recording of said copyrestricted content.

Yet still another aspect of the present invention is a recording andreproduction apparatus, characterized in that, at the time when saidreproduction means carries out a reproduction operation under thecondition wherein overwriting recording is being carried out in saidring buffer, the reproduction of said data is carried out starting fromthe position where the oldest piece of data is recorded in said ringbuffer.

Still yet another aspect of the present invention is a recording andreproduction apparatus, characterized in that, at the time when saidreproduction means carries out a reproduction operation under thecondition wherein overwriting recording is not carried out in said ringbuffer, the reproduction of said data is carried out starting from therecording start position on said ring buffer.

A further aspect of the present invention is a recording andreproduction apparatus, characterized in that, in the case that copyrestricted content recorded in said recording medium is not reproducedwithin said predetermined period of standby time, said recordingapparatus stops the recording operation of said copy restricted content.

A still further aspect of the present invention is a recording andreproduction apparatus, characterized by further comprising anotification means of making a notification of operational content ofsaid recording apparatus or of said reproduction means in advance basedon either said predetermined period of time or based on saidpredetermined period of standby time.

A yet further aspect of the present invention is a recording apparatus,characterized in that said recording means can measure time informationincluding said predetermined period of time.

A still yet further aspect of the present invention is a recordingapparatus, characterized in that said copy restricted content includestime information including said predetermined period of time.

An additional aspect of the present invention is a recording apparatus,characterized in that the time information including said predeterminedperiod of time is gained from the outside independently of said copyrestricted content.

In addition, a still additional aspect of the invention is areproduction apparatus characterized by comprising:

a control means of carrying out control so as to reproduce encrypteddata that is recorded on a disk by a recording apparatus;

a reproduction means, controlled by said control means, of reproducingsaid data; and

a decryption means of decrypting said reproduced data that is sent to aninterface,

wherein said control means controls said recording means so that saidrecording means reproduces said copy permission information;

said decryption means generates first information that includes at leastany of said device unique key and said copy permission information;

said decryption means generates a content key that is information gainedby decrypting said first information by using said recording unitinformation; and

said decryption means decodes said data by using said content key.

A yet additional aspect of the invention is a reproduction apparatuscharacterized by comprising:

a control means of carrying out control so as to reproduce encrypteddata recorded on a disk by a recording apparatus of the invention;

a reproduction means, controlled by said control means, of reproducingsaid data; and

a decryption means of decrypting said reproduced data that is sent to aninterface, wherein said control means controls said recording means sothat said recording means reproduces said encrypted title key; and

said decryption means decrypts said encrypted title key by using saiddevice unique key.

A still yet additional aspect of the invention is a reproductionapparatus characterized by comprising:

a control means of carrying out control so as to reproduce encrypteddata recorded on a disk by a recording apparatus;

a reproduction means, controlled by said control means, of reproducingsaid data; and

a decryption means of decrypting said reproduced data that is sent to aninterface,

wherein said decryption means decrypts said data by using said titlekey.

A still yet additional aspect of the invention is a reproductionapparatus characterized by comprising:

a control means of carrying out control so as to reproduce encrypteddata recorded on a disk by a recording apparatus;

a reproduction means, controlled by said control means, of reproducingsaid data; and

a decrption means of decrypting said reproduced data that is sent to aninterface,

wherein said control means controls said recording means so that saidrecording means reproduces said encrypted title key;

said decryption means decrypts said reproduced title key by using saiddevice unique key;

said decryption means generates third information including said titlekey;

by using recording unit information that is a numeral and/or a symbolinherent to a recording block under the premise of a recording unit thatis the minimum unit when said control means sequentially accesses saidrecording means, said decryption means generates a content key that isinformation gained by decrypting said third information; and

said decryption means decrypts said data by using said content key.

A still supplementary aspect of the invention is a reproductionapparatus characterized by comprising:

a control means of carrying out control so as to reproduce encrypteddata recorded on a disk by a recording apparatus;

a reproduction means, controlled by said control means, of reproducingsaid data; and

a decryption means of decrypting said reproduced data that is sent to aninterface, wherein said decryption means decrypts said data by usingsaid copy permission information.

A yet supplementary aspect of the invention is a reproduction apparatuscharacterized by comprising:

a control means of carrying out control so as to reproduce encrypteddata recorded on a disk by a recording apparatus;

a reproduction means, controlled by said control means, of reproducingsaid data; and

a decryption means of decrypting said reproduced data that is sent to aninterface, wherein said control means controls said recording means sothat said recording means reproduces said encrypted title key,

wherein said decryption means decrypts said reproduced title key byusing said device unique key;

said control means controls said recording means so that said recordingmeans reproduces said copy permission information;

said decryption means generates second information including, at least,any of said title key and said copy permission information; and

wherein by using recording unit information that is a numeral and/or asymbol inherent to a recording block under the premise of a recordingunit that is the minimum unit when said control means sequentiallyaccesses said recording means, said decryption means generates a contentkey that is information gained by decrypting said second information;and

said decryption means decrypts said data by using said content key.

A still yet supplementary aspect of the invention is a reproductionapparatus characterized by comprising:

a control means of carrying out control so as to reproduce encrypteddata recorded on a disk by a recording apparatus:

a reproduction means, controlled by said control means, of reproducingsaid data; and

a decryption means of decrypting said reproduced data that is sent to aninterface,

wherein said control means controls said recording means so as toreproduce said copy permission information; and

said decryption means decrypts said data by using said reproduced copypermission information.

One aspect of the invention is a medium characterized by being a mediumthat holds a program and/or data for allowing a computer to carry outthe entirety, or a part of, functions of the entirety, or a part of,that can be processed by a computer.

Another aspect of the invention is an information assembly characterizedby being a program and/or data for allowing a computer to carry out theentirety, or a part of, functions of the entirety, or a part of,

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram showing the configuration of a hard diskapparatus according to the first, second, fourth to sixth embodiments ofthe present invention;

FIG. 2 is a diagram for describing a summary of the functions of thehard disk apparatus according to the first embodiment of the presentinvention;

FIG. 3 is a block diagram showing the configuration of an encryptionmeans of the hard disk apparatus according to the first embodiment ofthe present invention;

FIG. 4 is a block diagram showing the configuration of a decryptionmeans of the hard disk apparatus according to the first embodiment ofthe present invention;

FIG. 5(a) is a flow chart showing the operation at the time of recordingof the hard disk apparatus according to the first embodiment of thepresent invention;

FIG. 5(b) is a schematic diagram showing the operational associations atthe time of the recording of the hard disk apparatus according to thefirst embodiment of the present invention;

FIG. 6(a) is a flow chart showing the operation at the time ofreproduction of the hard disk apparatus according to the firstembodiment of the present invention;

FIG. 6 (b) is a schematic diagram showing the operational associationsat the time of reproduction of the hard disk apparatus according to thefirst embodiment of the present invention;

FIG. 7 (a) is a diagram for describing a recording format used by thehard disk apparatus according to the first embodiment of the presentinvention;

FIG. 7(b) is a diagram showing an example of a format that differs fromthe format of FIG. 7(a);

FIG. 8 is a diagram that describes the values of CCI and the meaningsthereof;

FIG. 9 is a diagram for describing a magnetic disk format used forrecording and reproduction by the hard disk apparatus according to thefirst embodiment of the present invention;

FIG. 10 is a block diagram showing the configuration of a hard diskapparatus according to the third embodiment of the present invention;

FIG. 11 is a block diagram showing the configuration of an encryptionmeans of the hard disk apparatus according to the fourth embodiment ofthe present invention;

FIG. 12 is a block diagram showing the configuration of a decryptionmeans of the hard disk apparatus according to the fourth embodiment ofthe present invention;

FIG. 13 is a block diagram showing the configuration of an encryptionmeans of the hard disk apparatus according to the fifth embodiment ofthe present invention;

FIG. 14 is a block diagram showing the configuration of a decryptionmeans of the hard disk apparatus according to the fifth embodiment ofthe present invention;

FIG. 15 is a block diagram showing the configuration of an encryptionmeans of the hard disk apparatus according to the sixth embodiment ofthe present invention;

FIG. 16 is a block diagram showing the configuration of a decryptionmeans of the hard disk apparatus according to the sixth embodiment ofthe present invention;

FIG. 17(a) is a block diagram showing the configuration of an encryptionmeans of a hard disk apparatus according to an embodiment of the presentinvention;

FIG. 17(b) is a block diagram showing the configuration of a decryptionmeans of a hard disk apparatus according to an embodiment of the presentinvention;

FIG. 18(a) is a block diagram showing the configuration of an encryptionmeans of a hard disk apparatus according to an embodiment of the presentinvention;

FIG. 18(b) is a block diagram showing the configuration of a decryptionmeans of a hard disk apparatus according to an embodiment of the presentinvention;

FIG. 19(a) is a block diagram showing the configuration of an encryptionmeans of a hard disk apparatus according to an embodiment of the presentinvention;

FIG. 19(b) is a block diagram showing the configuration of a decryptionmeans of a hard disk apparatus according to an embodiment of the presentinvention;

FIG. 20 is a block diagram showing the configuration of a hard diskapparatus according to the seventh embodiment of the present invention;

FIG. 21 is a block diagram of an AVHDD1 and an archive device 2according to Embodiment 8 of the present invention;

FIG. 22 is a block diagram of an AVHDD12 and an archive device 13according to Embodiment 8 of the present invention;

FIG. 23 is a block diagram of an archive device 16 according toEmbodiment 8 of the present invention;

FIG. 24 is a block diagram of an AVHDD19 and the archive device 2according to Embodiment 8 of the present invention;

FIG. 25 is a block diagram of an AVHDD22 and an archive device 23according to Embodiment 9 of the present invention;

FIG. 26 is a block diagram of an AVHDD32 and a DVD apparatus 33according to Embodiment 11 of the present invention;

FIG. 27 is a configuration diagram of a stream according to Embodiment11 of the present invention;

FIG. 28 is a block diagram of an AVHDD81 with a copying means 80according to Embodiment 8 of the present invention;

FIG. 29 is a block diagram of an AVHDD91 with a copying means 90according to Embodiment 9 of the present invention;

FIG. 30 is a block diagram of an encrypted data decryption recordingsystem according to Embodiment 10 of the present invention;

FIG. 31 is a block diagram of a recording apparatus 100 according toEmbodiment 10 of the present invention;

FIG. 32 is a block diagram of a decryption recording apparatus 101according to Embodiment 10 of the present invention;

FIG. 33 is a configuration diagram of a recording and reproductionapparatus according to Embodiment 12 of the present invention;

FIG. 34 is a time chart for describing the operation of a recording andreproduction apparatus according to Embodiment 12 of the presentinvention;

FIG. 35 is a time chart for describing the operation of a recording andreproduction apparatus according to Embodiment 12 of the presentinvention;

FIG. 36 is a configuration diagram of a recording and reproductionapparatus according to Embodiment 13 of the present invention;

FIG. 37 is a time chart for describing the operation of a recording andreproduction apparatus according to Embodiment 13 of the presentinvention;

FIG. 38 is a time chart for describing the operation of a recording andreproduction apparatus according to Embodiment 13 of the presentinvention;

FIG. 39 is a time chart for describing the operation of a recording andreproduction apparatus according to Embodiment 14 of the presentinvention;

FIG. 40 is a configuration diagram of a recording and reproductionapparatus according to Embodiment 15 of the present invention;

FIG. 41 is a configuration diagram of a recording and reproductionapparatus according to Embodiment 16 of the present invention;

FIG. 42 is a diagram for describing the operation of a recording andreproduction apparatus according to Embodiment 16 of the presentinvention; and

FIG. 43 is a configuration diagram of a recording and reproductionapparatus for carrying out a time shift reproduction according to aprior art.

EXPLANATION OF NUMERALS

-   1 IEEE1394 bus-   2 hard disk apparatus-   3 host system-   4 I/F-   10 controller-   11 encryption means-   12 decription means-   13 device unique key-   14 control means-   15 recording means-   16 I/F-   17 encrypted content-   18 secret region-   19 encryptor-   22 adder-   23 title key-   24 CCI-   25 recording unit number-   26 content-   27 CCI-   28 encrypted title key-   29 magnetic disk medium-   31 decryptor-   32 decryptor-   33 decryptor-   34 adder-   35 title key-   36 CCI-   37 decrypted content-   39 recording unit-   41 format-   47 hard disk apparatus-   51 controller-   1001, 1012, 1019, 1022, 1032 AVHDD-   1002, 1013, 1016, 1023 archive device-   1003 STB-   1004, 1028 encryption means-   1005 first recording means-   1006, 1025, 1034 storage means-   1007, 1027 move means-   1008, 1031, 1038 reproduction means-   1009 second recording means-   1010, 1021 second recording medium-   1011, 1035 transmission means-   1014 buffer-   1015 high speed transmission means-   1017 decryption reproduction means-   1018 IC card-   1020 judgment means-   1024 third recording means-   1026 sentence simplification means-   1029 fourth recording means-   1030 third recording medium-   1033 DVD apparatus-   1036 fifth recording means-   1037 DVD-   2010 discrimination information detection means-   2011 time information acquisition means-   2012 recording and reproduction means-   2013 recording medium-   2014 recording buffer-   2015 control input I/F-   2016 switching means

PREFERRED EMBODIMENTS FOR CARRYING OUT THE INVENTION

In the following, embodiments of the present invention are describedwith respect to the drawings.

(First Embodiment)

First, the first embodiment is described.

FIG. 1 shows a configuration of a hard disk apparatus 2 that is oneembodiment of a recording apparatus and a reproduction apparatus of thepresent invention.

The hard disk apparatus 2 is connected to IEEE1394 bus 1 and, inaddition, the IEEE1394 bus 1 is connected to a host system 3.

The IEEE1394 bus 1 is a high performance serial bus according to theIEEE standard as described in the IEEE1394-1995 for relayingtransmissions of AV data or exchanges of commands.

A host system 3, which is provided with an I/F 16 that is an IEEE1394interface, is an apparatus, for example an STB (set top box: satellitebroadcast receiver) for moving data, for which copyright protection isnecessary, in order to be recorded in a hard disk apparatus 2, to theIEEE1394 bus 1 and for receiving data, for which copyright protection isnecessary, from the hard disk apparatus 2 via the IEEE1394 bus 1 and forreproducing the data.

The hard disk apparatus 2 is an apparatus that can record AV data in amagnetic disk medium while protecting the copyright and/or can reproducethe AV data from the magnetic disk medium while exchanging AV data withthe host system 3 via the IEEE1394 bus 1.

That is to say, the hard disk apparatus 2 is an apparatus that encryptsAV data, for which copyright protection is necessary such as encryptedcontent 17, records this on a magnetic disk medium 29, as shown in FIG.2, and reproduces the encrypted content 17.

The hard disk apparatus 2 is formed of an I/F 4, a controller 10 and arecording means 15.

In addition, the controller 10 is formed of an encryption means 11, adecryption means 12, a device unique key 13 and a control means 14.

The I/F 4 is an interface of the system of the IEEE1394-DTCP (digitaltransmission content protection) and is an interface that exchangescommands and AV data with an external device, such as a host system 3,via the IEEE1394 bus 1 and, in addition, that encrypts the AV data,certifies the other device and nullifies the key for decrypting theencryption according to whether or not the certification is successfulso that the copyright of the AV data that is transmitted to the IEEE1394bus 1 can be protected.

The encryption means 11 that forms the controller 10 is a means ofencrypting AV data sent from the I/F 4 as well as data added to the AVdata.

The decryption means 12 is a means of decrypting the AV data read out bythe recording means 15 and the data that is added to the AV data.

The configurations of the encryption means 11 and of the decryptionmeans 12 are described below.

The device unique key 13 is a numeral and/or a symbol that isspecifically allocated to each of the hard disk apparatuses 2 and isrecorded in a region that cannot be accessed from the outside of thehard disk apparatus 2 and/or of the controller 10.

The recording means 15 is formed of a magnetic disk medium for recordingdata, a magnetic head for recording and reproducing information on themagnetic disk medium, an actuator, on the tip of which the magnetic headis mounted, that carries out an operation for positioning of themagnetic head at an arbitrary radius position of the magnetic diskmedium, a spindle motor for rotating the magnetic disk medium, and thelike, and is a means of writing data in the magnetic disk medium or ofreading data out from the magnetic disk medium. The magnetic diskmedium, from which the recording means 15 reads out data and to whichthe recording means 15 writes in data, is built in into the hard diskapparatus 2 and is not removable from the hard disk apparatus 2.

The control means 14 is a means that designates an LBA and makes the LBAcorrespond to the head or to the sector of the magnetic disk medium ofthe recording means 15 and that positions the magnetic head bycontrolling the actuator and the spindle motor so that data is writteninto or read out from the magnetic disk medium by the magnetic head.

Now, as described above, FIG. 3 shows a configuration of the encryptionmeans 11.

The encryption means 11 is formed of an encryptor 19, an encryptor 20,an encryptor 21 and an adder 22.

In addition, the device unique key 13 is a numeral and/or a symbolspecific to the hard disk apparatus 2 allocated to the hard diskapparatus 2 as described above in FIG. 3. That is to say, a differentdevice unique key 13 is allocated to each of the hard disk apparatuses2. In addition, the device unique key 13 is stored in a secret region 18provided within the controller 10 of the hard disk apparatus 2. Thissecret region 18 is a region that is protected so that an externaldevice can neither write in nor read out information therefrom and onlythe controller 10 can read out information stored in the secret region18. Concretely, this secret region 18 can be implemented by using a ROMon a printed circuit board. That is to say, the device unique key 13 isrecorded in the ROM on the printed circuit board. Namely, this ROMcannot be accessed from the outside of the hard disk apparatus 2 and/orof the controller 10.

The title key 23 is a numeral and/or a symbol specifically allocated toeach piece of AV data.

CCI (copy control information) 24 is attached to the AV data and is anumeral of two bits representing copy permission information that issent by being attached to the by region of the isochronous header of theisochronous packet.

FIG. 8 shows the binary values that can be taken by the CCI and themeanings thereof. When the CCI is 11 it means “Copy Never.” That is tosay, though the AV data to which the CCI of this value is attached canbe viewed, making copies of this AV data by recording the AV data on thehard disk apparatus 2, or the like, is prohibited.

When the CCI is 10 it means “Copy Once.” That is to say, the AV data towhich the CCI of this value is attached can be viewed and, furthermore,only the first generation copy of the AV data can be made by recordingthe AV data on the hard disk apparatus 2, or the like.

When the CCI is 01 it means “No More Copy.” That is to say, the AV datacopied from the AV data of which the CCI is “Copy Once” becomes of “NoMore Copy.” Namely, this means that the making of additional copies isprohibited. That is, “No More Copy” is necessary to prohibit furthercopying at the time of reproduction after the content of “Copy Once” isrecorded.

When the CCI is 00 it means “Copy Free.” That is to say, the AV data towhich this value of the CCI is attached can be freely viewed and, inaddition, copies can be freely made.

A recording unit number 25 is a number and/or a symbol specific to therecording block that has the size of the recording unit that is theminimum unit when the control means 14 sequentially accesses therecording means 15. That is to say, a different recording unit number 25is allocated to the above described different recording block. Such arecording unit number 25 is secret information that cannot be seen bythe user or by an external device. The recording unit number 25 and arecording unit are described below.

Here, the recording unit number 25 of the present embodiment is anexample of the recording unit information of the present invention.

The content 26 is the AV data that forms a program, such as of movies,music or of a drama.

In addition, a magnetic disk medium 29 is a magnetic disk to or fromwhich data is written or read by the recording means 15.

The encryptor 19 is a means that reads out the device unique key 13,which is stored in the secret region 18 and that encrypts the title key23, so as to output the encrypted title key 28.

The adder 22 is a means of generating information for generating a keywherein the CCI 24 is added so as to follow the lowest bit of the titlekey 23.

Here, information for generating a key according to the presentembodiment is an example of the second information of the presentinvention.

The encryptor 20 is a means of generating a content key that isencrypted by using the recording unit number 25.

The encryptor 21 is a means of encrypting the content 26 by using thecontent key.

In addition, FIG. 4 shows the configuration of the decryption means 12.

The decryption means 12 is formed of a decryptor 31, a decryptor 32, adecryptor 33 and an adder 34.

In addition, FIG. 4 shows the device unique key 13, the title key 35,the CCI 36, the recording unit number 25 and the decrypted content 37,which, respectively, correspond to the device unique key 13, the titlekey 23, the CCI 24, the recording unit number 25 and the content 26shown in FIG. 3.

In addition, the magnetic disk medium 29 is a magnetic disk of which thedata is read out or written in by the recording means 15, which is thesame as in FIG. 3.

The decryptor 31 is a means of reading out the device unique key 13 thatis stored in the secret region 18 and of decrypting the encrypted titlekey 28 by using the device unique key 13 so as to output the title key35.

The adder 34 is a means of generating information for generating a keyto which the CCI 27 is added following the lowest bit of the title key35.

The decryptor 32 is a means of generating a content key by decryptingthe information for generating a key by using the recording unit number25.

The decryptor 33 is a means of decrypting the encrypted content 17 byusing the content key so as to output the decrypted content 37.

FIG. 7(a) shows a recording format of the magnetic disk medium 29 of therecording means 15. The region of the magnetic disk medium 29 is dividedinto a plurality of recording units 39, which are recording blocks ofthe size of the recording unit. The control means 14 cannot accessregions that are smaller than the recording unit 39 and always accessesthe recording block, such as 39, from the head. That is to say, thecontrol means 14 always writes in or reads out data to or from eachrecording block of the recording unit 39.

In addition, in the present embodiment, one recording unit 39 is dividedinto the regions of the header 38 and the data 40 for recording AV data.

The data 40 is a region in which a transport packet is recorded. Inaddition, the encrypted title key 35 is recorded in the header 38. Theinformation recorded in the region of the header 38 of the recordingunit 39 and the information recorded in the region of the data 40 is allencrypted.

Here, another example wherein AV data is recorded in the recording blockof the recording medium is shown in FIG. 7(b). The recording block 150is recorded by being divided into the header 151 and the data 152 in thesame manner as of the recording format of the present embodiment.However, the header 151 portion is the non-encryption 154 portion whilethe data 155 portion is the encryption portion. That is to say, only thedata 152 portion is encrypted. Accordingly, the key 153, which isencrypted and transferred at the time when the IEEE1394 bus 1, or thelike, is transferred, is recorded in the header 151 part without beingencrypted. Accordingly, in the case that an external device incorrectlyaccess the header 151 portion, the external device can gain the key 153and, therefore, the encryption of the AV data is decrypted and thecopyright thereof cannot be protected.

Contrarily, since the recording format of the present embodimentencrypts the entirety data recorded in the recording unit 39 as shown inFIG. 7(a), the copyright can be protected without fail in comparisonwith the recording format as shown in FIG. 7(b).

In such a manner, the recording format of the present embodiment isspecific to the manufacturer that manufactures the hard disk apparatus.Therefore, it is difficult for external devices that adopt a standardformat to read out data recorded in a format specific to such amanufacturer. Accordingly, by using the recording format of the presentembodiment, the copyright of the AV data recorded in the magnetic diskmedium 29 can be protected. In addition, the sector size or the size ofthe recording unit of the recording format of the present embodiment canbe freely designed.

As a concrete example of the recording unit, for example, a sector ofthe magnetic disk medium 29 is cited. That is to say, a predeterminednumber of sequential sectors can be a recording unit 39 such as onesector, sequential 62 sectors, sequential 128 sectors . . . sequential2048 sectors.

In addition, as a concrete example of the recording unit number 25, forexample, the LBA (logical block address) can be used as the recordingunit number 25. That is to say, any of the LBA of the head sector of therecording unit 39, the LBA of the second sector from the head of therecording unit 39 or the Nth (N is an integer of the total number, orless, of sectors that form the recording unit) sector from the head ofthe recording unit 39 can be used as the recording unit number 25.

Or, a number for uniquely specifying the recording unit 39 can beutilized. That is to say, the number when the recording unit 39 iscounted in the order of shifting from the inner periphery to the outerperiphery of the magnetic disk medium 29 can be the recording unitnumber 25.

Or, an address for internal management used for managing the recordingunits can be utilized.

Or, a numeric value or a symbol produced by combining this plurality ofexamples according to a predetermined rule may be used.

In summary, the recording unit number 25 may merely be information,without overlap, that cannot be seen by the user and that can uniquelyspecify the entirety of the recording unit 39 of the magnetic diskmedium 29.

Here, the hard disk apparatus 2 of the present embodiment is an exampleof a recording apparatus of the present invention, the hard diskapparatus 2 of the present embodiment is also an example of areproduction apparatus of the present invention and a recording means ofthe present embodiment is also an example of a reproduction means of thepresent invention.

Furthermore, the I/F 4 of the present embodiment is an example of aninterface of the present invention and a magnetic disk medium 29 of thepresent embodiment is an example of a disk of the present invention.

In addition, the controller 13, which includes the encryption means 11,the decryption means 12 and the device unique key 13, and the I/F 4 areintegrated and provided on one sheet of printed circuit board. Inaddition, the encryption means 11, the decryption means 12, the controlmeans 14 and the I/F 4 are, respectively, mounted as one chip LSIs.Signals in the terminals of these chips are scrambled by, for example,rearranging of the bits, according to a format that is not disclosed.Accordingly, even in the case that an external device takes out signalsthat can be reproduced as AV data from these terminals, it is not easyto reproduce AV data since the format that has generated the signals isnot known.

Next, the operation of the present embodiment formed in such a manner isdescribed.

First, the operation of the case wherein the hard disk apparatus 2records AV data that requires copyright protection is described.

Here, according to the present embodiment, the AV data is sent in theMPEG2 transport stream format.

The major operations of the host system 3 and of the hard disk apparatus2 are shown in the form of a flow chart in FIG. 5(a). In addition, theassociations of the operations of the host system 3 and of the hard diskapparatus 2 are shown by using a schematic diagram in FIG. 5(b).

The host system 3 encrypts AV data, for which copyright protection isnecessary, that is transmitted to the IEEE1394 bus 1 as an isochronouspacket.

The I/F 16 encrypts AV data in MPEG2 transport stream format.Furthermore, a source packet is generated by adding a source packetheader to the transport packet of the encrypted MPEG2 transport stream.Then, a CIP is generated by adding a CIP header to a data block fromwhich, or to which, the source packet is divided, or combined. Moreover,an isochronous packet is generated by adding an isochronous header tothe CIP and is transmitted to the IEEE1394 bus 1.

In addition, at the time when the isochronous packet is generated, theCCI 24 in FIG. 3 is added to the by region of the isochronous packet.

The host system 3 issues a command for the starting of the recording ofAV data in the hard disk apparatus 2.

This command is sent from I/F 16 to I/F 4 through the IEEE1394 bus 1 asan asynchronous packet.

When receiving the command that indicates the start of recording, theI/F 4 requires the certification from I/F 16.

Upon receiving this, the I/F 16 and the I/F 4 carry out a certificationoperation (S1). This certification operation is represented bycertification 85 in FIG. 5(b).

The I/F 16 judges whether the hard disk apparatus 2 is a proper deviceor an incorrect device for recording the AV data. In the case of aproper device, the certification is successful, while in the case of anincorrect device, the certification fails (S2).

In the case that the hard disk apparatus 2 is not qualified to record AVdata, the certification fails (S3). In this case, the hard diskapparatus 2 cannot record the AV data.

In the case that the hard disk apparatus 2 is a proper device that canrecord AV data, the certification succeeds.

When the certification is successful, the I/F 4 receives the isochronouspacket transmitted by the host system 3 after identifying theisochronous channel of the isochronous packet.

Then, the I/F 4 separates the CCI from the isochronous header of thereceived isochronous packet.

Then, the following operations are carried out depending on the value ofthe CCI.

When the CCI has a binary value of 11 in FIG. 8, that is to say in thecase of “Copy Never,” the I/F 4 makes a notification that no recordingprocessing is to be carried out to the host system 3 and does notinstruct the controller 10 to start recording processing because it isnot permitted to record the AV data.

When the CCI has a binary value of 10, that is to say in the case of“Copy Once,” the I/F 4 makes a notification that recording processing isto be started to the host system 3 and, in addition, instructs thecontroller 10 to start recording processing.

When the CCI has a binary value of 01, that is to say in the case of “NoMore Copy,” the I/F 4 carries out the same operation as in the case thatthe CCI is “Copy Never.”

When the CCI has a binary value of 00, that is to say in the case of“Copy Free,” a notification that recording processing to be started ismade to the host system 3 and, in addition, the controller 10 isinstructed so as to start recording processing.

Accordingly, in the case that the CCI has a binary value of 10, the I/F4 decodes the encrypted AV data with the key received from the hostsystem 3 at the time of the certification operation. Then, the decodedAV data is outputted for every transport packet according to the timingindicated by the time stamp for transmission that is added to the sourcepacket header for every transport packet. In the case that the CCI is00, since the AV data is sent without being encrypted, no decodingprocessing is carried out and the AV data is outputted for everytransport packet according to the timing indicated by the time stamp fortransmission.

Though the AV data outputted from the I/F 4 is decrypted in such amanner and becomes of the form of plain sentences, the AV data isoutputted by the signal inscribed in a format unique to the hard diskapparatus 2 and, therefore, even in the case that a third party takesout the signal from a terminal of the chip of the I/F 4, it is verydifficult to recover the AV data in a form that is useable by the thirdparty.

The MPEG2 transport packet sent from the I/F 4 is inputted to theencryption means 11.

First, the encryptor 19 reads out the device unique key 13 stored in thesecret region 18 (S4).

The encryption means 11 detects the title key 23 attached to the AV datasent from the I/F 4. Then, the encryptor 19 encrypts the detected titlekey 23 by means of the device unique key 13 (S5).

Next, the title key 23 encrypted by the encryptor 19 is recorded, as thetitle key 28 encrypted, in the magnetic disk medium 29 of the recordingmeans 15 in accordance with the control of the control means 14 (S6).This encrypted title key 28 is shown in FIG. 5(b).

Furthermore, the encryption means 11 detects the CCI 24 that is sentattached to the AV data. The detected CCI 24 is recorded, as the CCI 27,in the magnetic disk medium 29 of the recording means 15 in accordancewith the control of the control means 14.

The adder 22 generates information for key generation that isinformation to which the CCI 24 is attached so as to follow the lowestbit of the title key 23.

On the other hand, information related to which recording unit is torecord the AV data is also sent from the control means 14 as additionalinformation to the AV data. The encryption means 11 requires therecording unit number 25 of the recording unit that is to record the AVdata.

The encryptor 20 encrypts the information for generating the keygenerated by the adder by using the recording unit number 25 of therecording unit that is to record the AV data. This encrypted informationis referred to as a content key. The content key is encrypted accordingto the recording unit number 25 and varies for each recording unit.

Next, the encryptor 21 encrypts the content 26, which is the AV data tobe recorded thenceforth using the content key (S7).

The encrypted AV data is recorded, as the encrypted content 17, in arecording unit of the magnetic disk medium 29, wherein the data is to berecorded, of the recording means 15, according to the control of thecontrol means 14 (S8). FIG. 5(b) also shows the encrypted content 17.

In the following, the operation is repeated in the same manner whereininformation for key generation is encrypted by the recording unit number25 for every recording unit so as to generate a content key and thegenerated content key encrypts the content 26 (S7) so that the encryptedcontent 17 is recorded in the magnetic disk medium 29 (S8).

The hard disk medium 29 records AV data for which copyright protectionis necessary in the magnetic disk medium 29 in the above manner.

Next, the operation of the case wherein the hard disk apparatus 2reproduces AV data for which copyright protection is necessary isdescribed.

FIG. 6(a) shows a flow chart of the main operation of the host system 3and of the hard disk apparatus 2 at the time of reproduction. In thefollowing, the description is given according to this flow chart. Inaddition, FIG. 6(b) shows a schematic diagram wherein the associationsof the main operations of the host system 3 and the hard disk apparatus2 at the time of reproduction are described.

The host system 3 issues a command that instructs the hard diskapparatus 2 to start reproduction.

This command is sent from the I/F 16 to the I/F 4 through the IEEE1394bus 1 as an asynchronous packet.

Furthermore, the I/F 16 requires certification from the I/F 4.

By receiving this, the I/F 16 and the I/F 4 carry out the certificationoperation (S9). This certification operation is shown as thecertification 86 in FIG. 6(b).

The I/F 4 judges whether the host system 3 is a proper device or is anincorrect device for utilizing the AV data. In the case of a properdevice, certification is successful while in the case that of anincorrect device, certification fails (S10).

In the case that the host system 3 is not qualified to use the AV data,certification fails (S11). In this case, the host system 3 cannot recordthe AV data.

In the case that the host system 3 is a proper device that can recordthe AV data, certification is successful.

When the certification is successful, the I/F 4 makes a notification tothe controller 10 that a command for reproducing the AV data has beensent.

When the decryption means 12 receives this notification, the decryptor31 first reads in the device unique key 13 stored in the secret region18 (S12).

Furthermore, the recording means 15 reads out the encrypted title key 28from the magnetic disk medium 29 according to the control of the controlmeans 14 (S13). FIG. 6(b) also shows the encrypted title key 28.

The decryptor 31 decrypts the encrypted title key 28 with the deviceunique key 13 (S14). Then, the decryption means 12 transfers thedecrypted title key 35 to the I/F 4.

The recording means 15 reads out the CCI 27 from the magnetic diskmedium 29 according to the control of the control means 14.

The decryption means 12 transfers the CCI 27 to the I/F 4.

The adder 34 generates key generation information, which is informationgained by attaching the CCI 27 sequentially read out to the lowest bitof the decrypted title key 35.

The control means 14 designates the recording unit 39 that is to be readout and controls the recording means 15 so as to read out the encryptedcontent 17, which is information stored in the recording unit 39.

The decryption means 12 finds out the recording unit number 25 of therecording unit 39.

The decryptor 32 decrypts the key generation information generated bythe adder by using the recording unit number 25 of the recording unit 39that is ready to read out data. This decrypted information referred toas a content key. The content key is decrypted by the recording unitnumber 25 and, therefore, it varies for each recording unit.

Next, the recording means 15 reads out the encrypted content 17, whichis information stored in the recording unit, from which the data is tobe read out, of the magnetic disk medium 29, according to the control ofthe control means 14 (S15). FIG. 6(b) also shows the encrypted content17.

Next, the decryptor 33 decrypts the encrypted content 17 read out by therecording means 15 with the content key (S16).

The decryption means 12 transfers the decrypted content 37 to the I/F 4.

In the following, the operation is repeated in the same manner as abovewherein information for key generation is decrypted with the recordingunit number 25 for each recording unit so as to generate a content keyand the encrypted content 17 is read out (S15) and the encrypted content17 is decrypted with the content key (S16) so that the decrypted content27 is transferred to the I/F 4 as an MPEG2 transport stream.

In addition, though the AV data outputted from the decryption means 12is decrypted, it is a signal inscribed in a format unique to the harddisk apparatus 2 and, therefore, even a third party takes out the signalfrom a terminal of the chip of the decryption means 12, it is verydifficult to recover the AV data in a form that is useable by the thirdparty.

The I/F 4 encrypts the AV data sent from the controller 10. Then, theI/F 4 transfers the AV data to the IEEE1394 bus 1 as an isochronouspacket.

The I/F 16 of the host system 3 identifies the isochronous channel andreceives the isochronous packet so as to decode the encrypted AV data.

The I/F 16 outputs the received AV data as an MPEG2 transport stream.

The outputted AV data is separated by the transport stream decoder,which is not shown, and contained by the host system 3. Then, the AVdecoder, which is not shown, carries out the AV decoding so as toconvert the AV data into an analog signal that is displayed on amonitor.

The hard disk medium 29 reproduces the AV data for which copyrightprotection is necessary from the magnetic disk medium 29 in the abovemanner.

The hard disk apparatus 2 of the present embodiment can protect thecopyright of the AV data, for which copyright protection is necessary,in any case wherein AV data is being recorded, wherein the AV data isbeing reproduced and wherein the AV data has already been recorded inthe recording means 15.

Here, though the magnetic disk 29 is described to be unremovable fromthe hard disk apparatus 2 in the present embodiment, the invention isnot limited to this but, rather, the magnetic disk may be removable.

Furthermore, though the device unique key 13 is described as beingstored in a ROM as the secret region 18 on the printed circuit board ofthe hard disk apparatus 2 in the present embodiment, the invention isnot limited to this. The secret region 18 may be provided in themagnetic disk medium 29. That is to say, the device unique key 13 may bestored in a region of the magnetic disk 29 which the user cannot access.

Furthermore, though the encrypted title key 28 is described as beingrecorded in the user region, which the user can access, in the magneticdisk 29 in the present embodiment, the invention is not limited to this.It may be recorded in a system region that the user cannot access in thedisk medium 29. In addition, it may be recorded in a RAM provided on aprinted circuit board of the hard disk apparatus 2.

Furthermore, though the recording apparatus and the reproductionapparatus of the present invention are described as being integratedwith the hard disk apparatus 2 in the present embodiment, the inventionis not limited to this. The recording apparatus of the present inventionmay be formed of the I/F 4, the encryption means 11, the control means14 and the recording means 15 and is an apparatus that records AV datawhile the reproduction apparatus of the present invention may be formedof the I/F 4, the decryption means 12, the control means 14 and therecording means 15 and so on, in summary, the recording apparatus of thepresent invention may be provided with only an encryption means, acontrol means and a recording means. In addition, the reproductionapparatus of the present invention may be provided with only adecryption means and a control means.

Furthermore, though the I/F 4, the encryption means 11, the decryptionmeans 12 and the control means 14 of the hard disk apparatus 2 aredescribed as being formed, respectively, of one chip LSIs, the inventionis not limited to this. The I/F 4, the encryption means 11, thedecryption means 12 and the control means 14 may be formed,respectively, of a plurality of LSI chips. In addition, the AV data isdescribed as being inscribed in an undisclosed format at a terminal of achip, the invention is not limited to this but, rather, it may beencrypted so as to be transferred between terminals. In addition, theproperties of the terminals of the chips may be defined in anundisclosed format. Here, the properties of the terminals of the chipsrepresents properties such as which terminal outputs what kind ofsignals, which terminals are combined to output what kind of signals orwhich respective terminals are used for what kinds of applications.Since such properties of the terminals of the chips are defined in anundisclosed format, the user cannot know, for example, which respectiveterminals are used for what kinds of applications. In summary, a signalthat is detected at a terminal that outputs a signal that can bereproduced as AV data by a third party from among the terminals of theprinted circuit board and the terminals of the chips where the I/F 4 andthe controller 10 are provided may be entirely encrypted and/ordescribed in an undisclosed format or the properties of these terminalsmay merely be defined in an undisclosed.

Furthermore, the I/F 4, the encryption means 11, the decryption means 12and the control means 14 of the hard disk apparatus 2 of the presentembodiment may be formed of one LSI chip. In such a manner, thecopyright of the AV data can, without fail, be made even more secure.

Furthermore, though the AV data is described in the present embodimentas being encrypted using the CCI, the invention is not limited to this.The AV data may be encrypted without using the CCI. That is to say,instead of that, the adder 22 forms information for the key generationof the CCI and of the title key 23, the title key 23 may be directlyused as the information for key generation without using the adder 22 sothat the content key may be generated by encrypting this information forthe key generation with the recording unit number. Here, the title key23 of this case is an example of the third information of the presentinvention. In the case that the AV data is encrypted without using theCCI in such a manner, the CCI may be recorded in the magnetic diskmedium 29 as in the present embodiment or the CCI may not be recorded inthe magnetic disk medium 29.

Furthermore, though the hard disk apparatus 2 in the present embodimentis described as follows: in the case that the value of the CCI that isattached to the AV data is “Copy Never,” the AV data is not recorded; inthe case that the value of the CCI is “Copy Once,” the AV data isencrypted and is recorded; in the case that the value of the CCI is “NoMore Copy,” the AV data is not recorded; and in the case that the valueof the CCI is “Copy Free,” the AV data is encrypted and is recorded, theinvention is not limited to this. In any case wherein a value is takenby the CCI that is attached to the AV data, the AV data may be encryptedand recorded. Or, in the case that the value of the CCI attached to theAV data is “Copy Free,” the AV data may be recorded as plain sentenceswithout being encrypted.

Furthermore, though in the present embodiment the information for keygeneration is described as being information to which the read out CCIis attached so as to follow the lowest bit of the decrypted title key,the invention is not limited to this. The information for the keygeneration may be information to which the read out CCI is attachedbefore the highest bit of the title key. Furthermore, the informationfor key generation may be information that includes only the title keyand the CCI or may include the title key and the CCI and, furthermore,may include other information in addition to the above. In addition, itmay be information that includes either the title key or the CCI. Insummary, the information for key generation of the present embodimentmay be only information that includes, at least, either the title key orthe CCI.

(Second Embodiment)

Next, the second embodiment is described.

In the present embodiment, the process of CCI is mainly described.

FIG. 1 shows a configuration of a hard disk apparatus 2 that is oneembodiment of a recording apparatus and a reproduction apparatus of thepresent invention.

The configuration of the hard disk apparatus 2 of the present embodimentis the same as in the first embodiment.

FIG. 9 shows a format 41 of a magnetic disk medium 29 of a recordingmeans 15. The left side on the paper corresponds to the inner periphery45 of the disk of the magnetic disk medium 29 while the right side onthe paper corresponds to the outer periphery 46 of the disk. The regionof the inner periphery 45 side of the disk is system FAT 42 while theouter periphery 46 side of the disk is data 43.

The system FAT 42 is a system region that the user cannot access and isa region such as for file management information where the control means14 utilizes in order to control the system.

On the other hand, the data 43 is a region that the user can access andAV data is recorded. That is to say, as shown in FIGS. 3 and 4, theencrypted content 17, the encrypted title key 28, and the like, arerecorded.

Then, the CCI is recorded in each recording unit that forms data 43 inthe system FAT 42 as shown in the CCI data 44. That is to say, the valueof the CCI is allocated for each recording unit.

In addition, the file management information includes a FAT (fileallocation table) and information that is referred to as directory.

The FAT is a table wherein the address of a recording unit and theaddress of the next recording unit make a pair and indicates in whichrecording unit and in which order the data of a file is stored.

In addition, the directory is a table that manages a file in ahierarchical manner and is a table wherein the address of the headrecording unit in which a file name and the data stored in the file arestored as well as information indicating the properties such as whetherthe file is exclusively for reading in or whether the over writing ispossible make a pair.

Processing such as file formation, editing, erasing, and the like, canbe managed by using the FAT and the directory.

Next, the operation of the present embodiment in such a configuration isdescribed.

AV data is recorded in the hard disk apparatus 2 in the same manner asin the first embodiment. At this time, the AV data is recorded in eachrecording unit one after another in the same manner as in the firstembodiment. Whenever the recording of the AV data in a new recordingunit is completed, the control means 14 produces or updates the filemanagement information that indicates in which recording unit the AVdata is recorded. Then, this file management information is stored inits own memory.

Then, when the recording of the AV data is all completed, the controlmeans 14 writes the produced or updated file management information intothe system FAT 42 so as to update the system FAT 42.

Finally, the control means 14 writes the value of the CCI of therecording unit, into which the AV data is newly written, into the filemanagement information.

Thus the AV data is first recorded in the magnetic disk medium 29 at thetime when the AV data is recorded, and after the recording of the AVdata is completed the management information is recorded in the magneticdisk medium 29 and finally the CCI is written into the system FAT 42.

In addition, it is assumed that the user turns off the power of the harddisk apparatus 2 by mistakenly pulling out the power plug of the harddisk apparatus 2 while the AV data is being recorded. In such a case,the portions of the file management information and the CCI that havealready being recorded in the AV data that is already in recordingcondition are erased.

The hard disk apparatus 2 of the present embodiment reproduces the AVdata, of which the recording is interrupted in such a manner, asfollows.

The control means 14 determines the order in which empty recording unitsof the magnetic disk 29 is used for writing according to predeterminedrules.

The control means 14 reproduces the AV data, of which the recording hasbeen interrupted, from the file management information before updatingby assuming that the AV data is recorded according to the above rules.Then, the encryption means 11 attempts decrypting by using a combinationof the values for 2 bits of the CCI.

Then, furthermore, the AV data is decrypted from the beginning by usingthe values of the CCI of which the decrypting is successful.

The hard disk apparatus 2 of the present embodiment can normally decryptthe AV data, of which the recording is interrupted, in the above manner.

Furthermore, the end of the AV data is detected from the continuity ofthe value of PCR that is attached to the transport packet.

That is to say, the PCR is attached to the transport packet at intervalsof 100 ms at the longest and the value of PCR is a counter value of theupper 33 bits and the lower 9 bits which counts up at the frequency of27 MHz. Accordingly, when the value of PCR changes to the valuecorresponding to 100 ms, or more, it is understood that another piece ofAV data is reproduced by exceeding the terminal of the AV data.Accordingly, the encryption means 11 transfers the AV data only in therange, where the value of PCR is continuous, to the I/F 4.

Here, though the hard disk apparatus 2 of the present embodiment isdescribed as encrypting and decrypting in the same manner as in thefirst embodiment, the invention is not limited to this. Encryptiondiffering from that in the first embodiment may be carried out. Insummary, any hard disk apparatus may be used as long as it carries outencryption by using the CCI.

Moreover, though the hard disk apparatus 2 of the present embodiment isdescribed as attempting decrypting by assuming the value of CCI, theinvention is not limited to this. The CCI may be recorded in themagnetic disk 29 before the AV data is recorded so that the CCI isalways recorded in the recording means 15 even when the recording of theAV data is interrupted.

Furthermore, though the recording apparatus and the reproductionapparatus of the present invention are described as being integrated inthe hard disk apparatus 2 according to the present embodiment, theinvention is not limited to this. The recording apparatus of the presentinvention may be formed of the I/F 4, the encryption means 11, thecontrol means 14 and the recording means 15 and may be an apparatus forrecording AV data while the reproduction apparatus of the presentinvention may be formed of the I/F 4, the decryption means 12, thecontrol means 14 and the recording means 15 and, in other words, therecording apparatus of the present invention may only be provided withan encryption means, a control means and a recording means. In addition,the reproduction apparatus of the present invention may only be providedwith a decryption means and a control means.

Furthermore, though the present embodiment is described such that thefile management information includes FAT and the directory, theinvention is not limited to this. File management information such asthe HPFS (high performance file system) in OS/2, the file system of MacOS, the i node in UNIX, the VFAT (virtual FAT) in Windows 95, the NTFS(new technology file system) of Windows NT, or the like, may be used.Here, in this case, it is necessary for the recording unit described inthe first embodiment to be agreed with the recording block of thesetypes of file management information. In summary, file managementinformation in the OS that allows recording in and reproduction from ahard disk may be used.

(Third Embodiment)

Next, the third embodiment is described.

FIG. 10 shows a configuration of a hard disk apparatus 47 that is oneembodiment of a recording apparatus and a reproduction apparatus of thepresent invention.

The hard disk apparatus 47 of the present embodiment is provided with anI/F 48 in place of the I/F 4 of the first embodiment. In addition, acontroller 51 of the present embodiment does not have the encryptionmeans 11, the decryption means 12 and the device unique key 13.

The I/F 48 is an interface, which does not decrypt the encrypted AV datasent from the IEEE 1394 bus 1 and transfers it to the controller 51, andwhich transfers the encrypted AV data sent from the controller 51 to theIEEE 1394 bus 1 without change. Other parts are the same as of the I/F 4of the first embodiment.

Next, the operation of the hard disk apparatus 47 of the presentembodiment in the above configuration is described primarily inreference to the points differing from the operation in the firstembodiment.

First, the operation at the time of recording AV data is described.

The I/F 16 and the I/F 48 carries out a certification operation in thesame manner as in the first embodiment and, then, the certification isassumed to be successful. Then, the I/F 48 identifies an isochronouschannel and receives an isochronous packet sent from the host system 3.

Then, an MPEG 2 transport stream is reconstructed from the isochronouspacket. Then, the transport packet is sequentially transferred to thecontroller 51.

The control means 14 controls the recording means 15 to record theencrypted AV data in the magnetic disk 29.

Other parts are the same as in the first embodiment.

The hard disk apparatus 47 of the present embodiment recodes theencrypted AV data without change in the above manner.

Next, the operation at the time when the encrypted AV data is reproducedis described.

The I/F 16 and the I/F 48 carries out the certification operation in thesame manner as in the first embodiment and, then, the certification isassumed to be successful. Then, the control means 14 controls therecording means 15 to read out the encrypted AV data and, then, thecontroller 51 transfers the read out AV data to the I/F 48 as the MPEG 2transport stream.

The I/F 48 transfers the encrypted MPEG 2 transport stream to the IEEE1394 bus 1 as an isochronous packet.

All other parts are the same as in the first embodiment.

The hard disk apparatus 47, having a simple configuration, can protectthe copy right of AV data by recording or reproducing the AV data, whichis encrypted for transmission, without change.

(Fourth Embodiment)

Next, the fourth embodiment is described.

FIG. 1 shows a hard disk apparatus 2 that is one embodiment of arecording apparatus and a reproduction apparatus of the presentinvention. The hard disk apparatus 2 of the present embodiment hasanother encryption means and another decryption means in place of theencryption means 11 and the decryption means 12 of the hard diskapparatus 2 described in the first embodiment.

FIG. 11 shows an encryption means 60 of the hard disk apparatus 2 of thepresent embodiment. In addition, FIG. 12 shows a decryption means 61 ofthe present embodiment.

The present embodiment is described primarily in reference to theencryption means 60 and the decryption means 61 that differ from thosein the first embodiment.

In FIG. 11, the encryption means 60 is formed of an encryptor 19, anencryptor 52 and an encryptor 21. That is to say, the encryption means60 differs from the encryption means 11 of the first embodiment and doesnot use the CCI for encryption.

That is to say, the encryptor 19 is a means of reading in the deviceunique key 13 that is stored in the secret region 18 and of encryptingthe title key 23 so that the encrypted title key 28 is outputted.

Here, the title key 23 of the present embodiment is an example of thefirst information of the present invention.

The encryptor 52 is a means of generating a content key that is gainedby encrypting the title key 23 by using the recording unit number 25.

The encryptor 21 is a means of encrypting the content 26 by using acontent key.

FIG. 12 shows a decryption means 61 of the hard disk apparatus 2 of thepresent embodiment.

In FIG. 12, the decryption means 61 is formed of a decryptor 31, adecryptor 53 and a decryptor 33. The decryption means 61 differs fromthat of the first embodiment and does not use the CCI for decrypting.

That is to say, the decryptor 31 is a means of reading in the deviceunique key 13 that is stored in the secret region 18 and of decryptingthe encrypted title key 28 by using the device unique key 13 so that thetitle key 35 is outputted.

Here, the title key 28 of the present embodiment is an example of thesecond information of the present invention.

The decryptor 53 is a means of decrypting the title key 35 by using therecording unit number 25 so as to generate a content key.

The decryptor 33 is a means of decrypting the encrypted contents 17 byusing a content key so as to output the decrypted content 37.

Next, the operation of the present embodiment in such a configuration isdescribed primarily in reference to the operations of the encryptionmeans 60 and the decryption means 61 that differ from those of the firstembodiment.

First, the operation of the encryption means 60 is described.

The encryptor 19 reads in the device unique key 13 stored in the secretregion 18.

The encryption means 60 detects the title key 23 that is added to the AVdata sent from the I/F 4. Then, the encryptor 19 encrypts the detectedtitle key 23 by means of the device unique key 13.

Next, the title key 23 encrypted by the encryptor 19 is recordedaccording to the control of the control means 14 in the same manner asof the encrypted title key 28 in the magnetic disk medium 29 of therecording means 15.

Furthermore, the encryption means 60 detects the CCI 24 that is sent bybeing added to the AV data. The detected CCI 24 is recorded in themagnetic disk medium 29 of the recording means 15 as the CCI 27according to the control of the control means 14.

The encryption means 60 finds the recording unit number 25 of therecording unit in which the CCI is recorded.

The encryptor 52 encrypts the title key 23 by using the recording unitnumber 25 of the recording unit in which the AV data is to be recorded.This encrypted information is referred to as content key. The contentkey is encrypted by using the recording unit number 25 and varies foreach recording unit.

Next, the encryptor 21 encrypts the content 26 that is the AV data to berecorded by using the content key.

The encrypted AV data is recorded, as the encrypted contents 17, in therecording unit, wherein it is to be recorded, of the magnetic diskmedium 29 of the recording means 15 according to the control of thecontrol means 14.

In the following the operation is repeated wherein the title key 23 isencrypted by using the recording unit number 25 for each recording unitso as to generate a content key in the same manner as the above and thegenerated content key is used to encrypt the content 26 so that theencrypted content 17 is recorded in the magnetic disk medium 29.

Thus the hard disk medium 29 records the AV data, of which the copyrightprotection is necessary, in the magnetic disk medium 29.

Next, the operation of the decryption means 61 is described.

The decryptor 31 reads in the device unique key 13 stored in the secretregion 18.

Furthermore, the recording means 15 reads out the encrypted title key 28from the magnetic disk medium 29 according to the control of the controlmeans 14.

The decryptor 31 decrypts the encrypted title key 28 by means of thedevice unique key 13. Then, the decryption means 61 transfers thedecrypted title key 35 to the I/F 4.

The recording means 15 reads out the CCI 27 from the magnetic diskmedium 29 according to the control of the control means 14.

The decryption means 12 transfers the CCI 27 to the I/F 4.

The control means 14 designates the recording unit 39 from which theencrypted content 17 is to be read out and controls the recording means15 to read out the content 17 that is the information stored in therecording unit 39.

The decryption means 61 finds the recording unit number 25 of therecording unit 39.

The decryptor 53 decrypts the title key 35 by using the recording unitnumber 25 of the recording unit 39 from which data is to be read out.This decrypted information is referred to as content key. Since thecontent key is decrypted by using the recording unit number 25, itvaries for each recording unit.

Next, the recording means 15 reads out the encrypted content 17 that isthe information stored in the recording unit, from which the informationis to be read out, of the magnetic disk medium 29 according to thecontrol of the control means 14.

Next, the decryptor 33 decrypts the encrypted content 17 read out by therecording means 15 by using the content key.

The decryption means 61 transfers the decrypted content 37 to the I/F 4.

In the following, the operation is repeated in the same manner, whereinthe title key 35 is decrypted for each recording unit by using therecording unit number 25 so as to generate a content key, wherein theencrypted content 17 is read out and wherein the encrypted content 17 isdecrypted by using the content key so that the decrypted content 27 istransferred to the I/F 4 as an MPEG 2 transport stream.

The same effects as in the first embodiment can be gained by using theencryption means 60 and the decryption means 61, which are described inthe present embodiment, in the hard disk apparatus 2.

In addition, the encryption means 60 and the decryption means 61 can ofcourse be applied to a variety of modifications described in the firstembodiment.

(Fifth Embodiment)

Next, the fifth embodiment is described.

FIG. 1 shows a hard disk apparatus 2 that is one embodiment of arecording apparatus and a reproduction apparatus of the presentinvention. The hard disk apparatus 2 of the present embodiment hasanother encryption means and another decryption means in place of theencryption means 11 and the decryption means 12 of the hard diskapparatus 2 described in the first embodiment.

FIG. 13 shows an encryption means 62 of the hard disk apparatus 2 of thepresent embodiment. In addition, FIG. 14 shows a decryption means 63 ofthe present embodiment.

The present embodiment is described primarily in reference to theencryption means 62 and the decryption means 63 that differ from thoseof the first embodiment.

In FIG. 13, the encryption means 62 are formed of an adder 54, anencryptor 55 and an encryptor 21. The encryption means 62 of the presentembodiment differs from the encryption means 11 and does not use a titlekey for the encryption of the AV data.

That is to say, the adder 54 is a means of generating information forkey generation to which the CCI 24 is added so as to follow the lowerbit of the device unique key 13.

Here, the information for key generation of the present embodiment is anexample of the first information of the present invention.

The encryptor 55 is a means of generating a content key that is gainedby encrypting the information for key generation using the recordingunit number 25.

The encryptor 21 is a means of encrypting the content 26 by using acontent key.

FIG. 14 shows a decryption means 63 of the hard disk apparatus 2 of thepresent embodiment.

In FIG. 14, the decryption means 13 is formed of an adder 56, adecryptor 57 and a decryptor 33.

The adder 56 is a means of reading in the device unique key 13 stored inthe secret region 18 and of generating information for key generation towhich the CCI 36 is added so as to follow the lower bit of the deviceunique key 13.

The decryptor 57 is a means of decrypting the information for keygeneration by using the recording unit number 25 so as to generate acontent key.

The decryptor 33 is a means of decrypting the encrypted content 17 byusing a content key so as to output the decrypted content 37.

Next, the operation of the present embodiment in such a configuration isdescribed primarily in reference to the operations of the encryptionmeans 62 and the decryption means 63 that differ from the firstembodiment.

First, the operation of the encryption means 62 is described.

The adder 54 reads in the device unique key 13 stored in the secretregion 18. Then, information for key generation to which the CCI 24 isadded so as to follow the lower bit of the device unique key 13 isgenerated.

Furthermore, the encryption means 62 detects the CCI 24 that is sent bybeing attached to the AV data. The detected CCI 24 is recorded, as theCCI 27, in the magnetic disk medium 29 of the recording means 15according to the control of the control means 14.

Then, the adder 54 generates information for key generation to which theCCI 24 is added so as to follow the lower bit of the device unique key13.

The encryption means 62 finds the recording unit number 25 of therecording unit in which data is to be recorded.

The encryptor 55 encrypts the information for key generation by usingthe recording unit number 25 of the recording unit in which the AV datais to be recorded. This encrypted information is referred to as acontent key. Since the content key is encrypted by using the recordingunit number 25, it varies for each recording unit.

Next, the encryptor 21 encrypts the content 26 that is the AV data to berecorded by using the content key.

The encrypted AV data is recorded, as the encrypted content 17, in therecording unit, wherein the data is to be recorded, of the magnetic diskmedium 29 of the recording means 15 according to the control of thecontrol means 14.

In the following, the operation is repeated in the same manner whereinthe information for key generation is encrypted for each recording unitby using the recording unit number 25 so as to generate a content keyand the generated content key is used to encrypt the content 26 so thatthe encrypted content 17 is recorded in the magnetic disk medium 29.

Thus the hard disk medium 29 records the AV data, of which the copyrightprotection is necessary, in the magnetic disk medium 29.

Next, the operation of the decryption means 63 is described.

The adder 56 reads in the device unique key 13 stored in the secretregion 18.

The recording means 15 reads out the CCI 27 from the magnetic diskmedium 29 according to the control of the control means 14.

The decryption means 63 transfers the CCI 27 to the I/F 4.

The adder 56 generates information for key generation to which the CCI27 is added so as to follow the lower bit of the device unique key 13.

The control means 14 designates the recording unit 39 from which theencrypted content 17 is to be read out and controls the recording means15 to read out the content 17 that is the information stored in therecording unit 39.

The decryption means 63 finds the recording unit number 25 of therecording unit 39.

The decryptor 57 decrypts the information for key generation by usingthe recording unit number 25 of the recording unit 39 from which data isto be read out. This decrypted information is referred to as contentkey. Since the content key is decrypted by the recording unit number 25,it varies for each recording unit.

Next, the recording means 15 reads out the encrypted content 17 that isthe information stored in the recording unit, from which the informationis to be read out, of the magnetic disk medium 29 according to thecontrol of the control means 14.

Next, the decryptor 33 decrypts the encrypted content 17 read out by therecording means 15 using the content key.

The decryption means 63 transfers the decrypted content 37 to the I/F 4.

In the following, the operation is repeated in the same manner whereinthe information for key generation is decrypted for each recording unitby using the recording unit number 25 so as to generate a content key,wherein the encrypted content 17 is read out so that the encryptedcontent 17 is decrypted by using the content key and wherein thedecrypted content 27 is transferred to the I/F 4 as an MPEG 2 transportstream.

The same effects as in the first embodiment can be gained by using theencryption means 62 and the decryption means 63, which are described inthe present embodiment, in the hard disk apparatus 2.

In addition, the encryption means 62 and the decryption means 63 can ofcourse be applied to a variety of modifications described in the firstembodiment.

(Sixth Embodiment)

Next, the sixth embodiment is described.

FIG. 1 shows a hard disk apparatus 2 that is one embodiment of arecording apparatus and a reproduction apparatus of the presentinvention. The hard disk apparatus 2 of the present embodiment hasanother encryption means and another decryption means in place of theencryption means 11 and the decryption means 12 of the hard diskapparatus 2 described in the first embodiment.

FIG. 15 shows an encryption means 64 of the hard disk apparatus 2 of thepresent embodiment. In addition, FIG. 16 shows a decryption means 65 ofthe present embodiment.

The present embodiment is described primarily in reference to theencryption means 64 and the decryption means 65 that differ from thoseof the first embodiment.

In FIG. 15, the encryption means 64 is formed of an encryptor 58 and anencryptor 21. The encryption means 64 of the present embodiment differsfrom the encryption means 11 and does not use the title key and the CCIfor the encryption of the AV data.

That is to say, the encryptor 58 is a means of generating a content keythat is gained by encrypting the device unique key 13 using therecording unit number 25.

Here, the device unique key 13 of the present embodiment is an exampleof the first information of the present invention.

The encryptor 21 is a means of encrypting the content 26 by using acontent key.

FIG. 16 shows the decryption means 65 of the hard disk apparatus 2 ofthe present embodiment.

In FIG. 16, the decryption means 65 is formed of a decryptor 59 and adecryptor 33.

The decryptor 59 is a means of decrypting the device unique key 13 byusing the recording unit number 25 so as to generate a content key.

The decryptor 33 is a means of decrypting the encrypted content 17 byusing the content key so as to output the decrypted content 37.

Next, the operation of the present embodiment in such a configuration isdescribed primarily in reference to the operations of the encryptionmeans 64 and the decryption means 65 that differ from those of the firstembodiment.

First, the operation of the encryption mean 64 is described.

The encryption means 64 detects the CCI 24 that is sent by being addedto the AV data. The detected CCI 24 is recorded, as the CCI 27, in themagnetic disk medium 29 of the recording means 15 according to thecontrol of the control means 14.

The encryptor 58 reads out the device unique key 13 from the secretregion 18.

The encryption means 64 finds the recording unit number 25 of therecording unit in which the CCI is to be recorded.

The encryptor 58 encrypts the disk unique key 13 by using the recordingunit number 25 of the recording unit in which the AV data is to berecorded. This encrypted information is referred to as content key.Since the content key is encrypted by using the recording unit number25, it varies for each recording unit.

Next, the encryptor 21 encrypts the content 26 that is the AV data to berecorded by using the content key.

The encrypted AV data is recorded, as the encrypted content 17, in therecording unit, wherein the data is to be recorded, of the magnetic diskmedium 29 of the recording means 15 according to the control of thecontrol means 14.

In the following, the operation is repeated in the same manner, whereinthe device unique key 13 is encrypted for each recording unit by usingthe recording unit number 25 so as to generate a content key, whereinthe generated content key is used to encrypt the content 26 and whereinthe encrypted content 17 is recorded in the magnetic disk medium 29.

The AV data, of which the copyright protection is necessary, is recordedin the magnetic disk medium 29 in such a manner.

Next, the operation of the decryption means 63 is described.

The decryptor 59 reads in the device unique key 13 stored in the secretregion 18.

The recording means 15 reads out the CCI 27 from the magnetic diskmedium 29 according to the control of the control means 14.

The decryption means 65 transfers the CCI 27 to the I/F 4.

The control means 14 designates the recording unit 39, from which theCCI is to be read out, and controls the recording means 15 to read outthe encrypted content 17 that is the information stored in the recordingunit 39.

The decryption means 63 finds the recording unit number 25 of therecording unit 39.

The decryptor 59 decrypts the device unique key by using the recordingunit number 25 of the recording unit 39 from which data is to be readout. This decrypted information is referred to as content key. Since thecontent key is recorded by using the recording unit number 25, it variesfor each recording unit.

Next, the recording means 15 reads out the encrypted content 17 that isthe information stored in the recording unit, from which the informationis read out, of the magnetic disk medium 29 according to the control ofthe control means 14.

Next, the decryptor 33 decrypts the encrypted content 17 read out by therecording means 15 using the content key.

The recording means 63 transfers the decrypted content 37 to the I/F 4.

In the following, the operation is repeated in the same manner whereinthe device unique key 13 is decrypted for each recording unit by usingthe recording unit number 25 so as to generate a content key, whereinthe encrypted content 17 is read out so that the encrypted content 17 isdecrypted by using the content key and wherein the decrypted content 27is transferred to the I/F 4 as an MPEG 2 transport stream.

The decryption means 65 decrypts the encrypted content 17 in such amanner.

The same effects as of the first embodiment can be gained by using theencryption means 64 and the decryption means 65, which are described inthe present embodiment, in the hard disk apparatus 2.

In addition, the encryption means 64 and the decryption means 65 can ofcourse be applied to a variety of modifications described in the firstembodiment.

Here, though a variety of encryption means and decryption means areshown in the fourth to the sixth embodiments, the invention is notlimited to these, but rather, the encryption means and the decryptionmeans, for example, as shown in FIGS. 17, 18 and 19 can also be used inplace of the encryption means 11 and the decryption means 12 of the harddisk apparatus 2.

FIG. 17(a) shows an encryption means 73. The encryption means 73 usesthe device unique key 13 so that the encryptor 67 encrypts the content26.

In addition, FIG. 17(b) shows a decryption means 74. A decryptor 68decrypts the content 17 that is encrypted by the encryption means 73 byusing the device unique key 13 so that the decryption means 74 outputsthe decrypted content 37.

FIG. 18(a) shows an encryption means 75. The encryption means 75 usesthe recording unit number 25 so that an encryptor 69 encrypts thecontent 26.

FIG. 18(b) shows a decryption means 76. A decryptor 70 decrypts theencrypted content 17, which is encrypted by the encryption means 75, byusing the recording unit number 25 so that the decryption means 76outputs the decrypted content 37.

FIG. 19(a) shows an encryption means 77. Encryptor 71 encrypts thecontent 26 by using the device unique key 13 and the recording unitnumber 25 in the encryption means 77. Here, the encryption means 77 canhave a configuration wherein an adder is added so that the addercombines the device unique key 13 and the recording unit number 25 andso that the encryptor 71 encrypts the content 26 by using thisinformation.

FIG. 19(b) shows a decryption means 78. A decryptor 72 decrypts theencrypted content 17 that is encrypted by the encryption means 77 byusing the device unique key 13 and the recording unit number 25 in thedecryption means 78.

Here, the decryption means 78 may have the configuration wherein anadder is added so that the adder combines the device unique key and therecording unit number 25 and so that the decryptor 72 decrypts theencrypted content 17 by using this information.

(Seventh Embodiment)

Next, the seventh embodiment is described.

FIG. 20 shows a configuration of a hard disk apparatus 83 that is oneembodiment of a recording apparatus and a reproduction apparatus of thepresent invention.

The hard disk apparatus 83 is provided with a CCI judgment means 79 anda reproduction information management means 80 in addition to the harddisk apparatus 2 of the first embodiment. In addition, it is providedwith an I/F 81 in place of the I/F 4 of the first embodiment and acontrol means 82 in place of the control means 14 of the firstembodiment.

The point wherein the I/F 81 differs from the I/F 4 of the firstembodiment is that the I/F 81 makes a notification of starting therecording process to the controller 10 even in the case that the CCI ofthe AV data received from the IEEE 1394 bus 1 is “Copy Never” and thecontroller 10 can record the AV data under predetermined conditionsaccording to the notification from the I/F 81 even in the case that theCCI of the AV data is “Copy Never.”

In addition, the CCI judgment means 79 is a means of judging the valueof the CCI of the reproduced AV data so as determine the value of theCCI after reproduction.

The reproduction information management means 80 is a means of managingthe reproduction information that is information of whether or not theAV data recorded in the recording means 15 is once reproduced for eachrecording unit.

In addition, the reproduction management means 80 is also a means ofmanaging the information of whether the AV data recorded in the recodingmeans 15 has been copied, or has not yet been copied, in another devicefor each recording unit.

In reference to the reproduction information, it can be known whether ornot the AV data recorded in the recording unit has been once reproduced,or has not been reproduce at all, and the reproduction information can,for example, be represented with a flag of one bit.

In addition, in reference to copy information, it can be known if the AVdata recorded in the recording unit has been once copied, or has notbeen copied at all.

The control means 82 is a means, in addition to the control means 14 ofthe first embodiment, for supplying the CCI of the AV data duringreproduction to the CCI judgment means 79 so as to control the recordingmeans 15 to carry out, or not to carry out, the reproduction of the AVdata in accordance with the CCI of the AV data during reproduction andthe reproduction information that is generated and updated by thereproduction information management means 80 and for supplying the CCIof the AV data while being copied to another device to the CCI judgmentmeans 79 so as to control the recording means 15 to make, or not tomake, a copy of the AV data in accordance with the CCI of the AV datawhile being copied and the copy information generated and updated by thereproduction information management means 80.

Here, the CCI judgment means 79, the control means 82 and thereproduction information management means 80 of the present embodimentare examples of control means of the present invention while the I/F 81of the present embodiment is an example of an interface of the presentinvention.

Next, the operation of the present embodiment in such a configuration isdescribed primarily in reference to the point differing from that of thefirst embodiment.

First, the operation at the time of recording is described.

AV data is sent from the host system.

The I/F 81 makes a notification of starting recording to the controller84 in the case that the CCI of the AV data is “Copy Never.”

The encryption means 11 encrypts the AV data.

The recording means 15 records the encrypted AV data in the magneticdisk 29 according to the control of the control means 82. At this time,the CCI is also recorded in the same manner as in the first embodiment.

Here, the control means 82 records the AV data in the case that the CCIis “Copy Never.” The AV data where the CCI recorded in the recordingmeans 15 is “Copy Never” however, becomes unreproducible a predeterminedperiod of time after being recorded. How it becomes unreproducible afterthe predetermined period of time is described below.

In addition, the control means 82 outputs the CCI so that it copies theAV data of “Copy Once” and becomes unreproducible a predetermined periodof time after being outputted for copying. This is also described below.

The reproduction information management means 80 generates reproductioninformation and copy information as follows when the AV data is recordedin the recording means 15 for each recording unit.

That is to say, when the AV data is newly recorded, reproductioninformation is set to be not yet reproduced for each recording unitwhile copy information is set to be not yet copied. Furthermore, thetime when the AV data is recorded is recorded.

Next, the operation in the case that the AV data that is recorded insuch a manner is reproduced is described.

The reproduction information management means 80 refers to thereproduction information of the AV data in the recording unit that is tobe reproduced and makes a notification to the control means 82.

Furthermore, the CCI judgment means 79 judges the value of the CCI ofthe AV data to be reproduced so as to determine the value of CCI in thecase of reproduction and output.

That is to say, in the case that the CCI of the reproduced AV data is“Copy Never,” the CCI at the time of being outputted from the I/F 81 isset to be “Copy Never.” In addition, in the case that the CCI of thereproduced AV data “Copy Once,” the CCI at the time of being outputtedfrom the I/F 81 is changed to “No More Copy.” In addition, in the casethat the CCI is “Copy Free,” the CCI at the time of being outputted fromthe I/F 81 is set to be “Copy Free.” In addition, since the AV data ofwhich the value of the CCI is “No More Copy” is not recorded the CCIdoes not become “No More Copy.”

The recording means reproduces the AV data according to the control ofthe control means 82.

The reproduction information management means 80 updates thereproduction management information as follows.

That is to say, when the AV data for the recording unit is reproduced anotification of this reproduction information is made to the controlmeans 82. In addition, when the AV data for the recording unit isreproduced, the reproduction information for this portion is set ascompletion of reproduction.

In the case that the reproduction information of the AV data that isbeing reproduced at present has already completed reproduction, thereproduction information management means 80 makes a notification to thecontrol means 82.

In addition, the reproduction information management means 80 makes anotification of the time information of the AV data that is beingreproduced at present to the control means 82.

The control means 82 carries out the following operation in accordancewith the value of the CCI before being changed by means of the CCIjudgment means 79.

That is to say, in the case that the CCI is the AV data of “Copy Never,”the reproduction information controls the reproduction of the completedreproduction portion to stop. In addition, in the case that apredetermined period of time, for example, 240 hours (10 days), or more,has passed up to the present time since the time shown by the timeinformation concerning to the above AV data of which the notification ismade by the reproduction information management means 80, the above AVdata is controlled so as not to be reproduced.

In addition, in the case that the CCI is the AV data of “Copy Once,” thereproduction is controlled to continue irrelevant of the value of thereproduction information.

In addition, in the case that the CCI is the AV data of “Copy Free,” thereproduction is controlled to continue.

The reproduced AV data is decrypted by the decryption means 12 in such amanner.

Then, it is encrypted for transmission by the I/F 81 so as to beoutputted as an isochronous packet to the IEEE 1394 bus 1. At this time,the CCI determined by the CCI judgment means 79 is added to theisochronous header as described above.

Next, the operation in the case that the AV data recorded in such amanner is copied is described.

The reproduction information controls means 80 refers to the copyinformation of the AV data of the recording unit to be copied and makesa notification to the control means 82.

Furthermore, the CCI judgment means 79 judges the value of the CCI ofthe AV data to be copied and determines the value of the CCI in the caseof reproduction and output.

That is to say, in the case that the CCI of the reproduced AV data is“Copy Never,” the CCI at the time of the output from the I/F 81 iseither not set or set to be “Copy Never.” In addition, in the case thatthe CCI of the reproduced AV data is “Copy Once,” the CCI at the time ofthe output from the I/F 81 is made to remain “Copy Once” and is notchanged to “No More Copy.” In addition, in the case that the CCI is“Copy Free,” the CCI at the time of the output from the I/F 81 is set tobe “Copy Free.” In addition, since the AV data of which the value of theCCI is “No More Copy” is not recorded, the CCI does not become “No MoreCopy.”

The recording means reproduces the AV data to be copied in accordancewith the control of the control means 82.

The reproduction information management means 80 updates the copymanagement information as follows.

That is to say, when the AV data for the recording unit is copied anotification of this copy information is made to the control means 82.In addition, when the AV data for the recording unit is copied, the copyinformation for this portion is set as completion of copy.

The reproduction information management means 80 makes a notification tothe control means 82 in the case that the copy information of the AVdata that is being copied at present is already copy completion.

The control means 82 operates as follows in accordance with the value ofthe CCI before being changed by means of the CCI judgment means 79.

That is to say, in the case that the CCI is the AV data of “Copy Never,”the means controls the data not to be copied.

In addition, in the case that the CCI is the AV data of “Copy Once,” thecopy information is controlled not to copy the portion of copycompletion while in the case that the copy information is not copied,the copy information is controlled not to continue copying only when theapparatus wherein the AV data of that portion is recorded is anapparatus for recording the above data for a backup.

In addition, in the case that the CCI is the AV data of “Copy Free,” themeans controls the copying to be continued.

The AV data reproduced for being copied is decrypted by the decryptionmeans 12 in such a manner.

Then, it is encrypted for transmission by the I/F 81 so as to beoutputted as an isochronous packet to the IEEE 1394 bus 1. At this time,the CCI determined by the CCI judgment means 79 is added to theisochronous header in the above manner. It is received by another devicethrough the IEEE 1394 bus 1 so as to be recorded.

In addition, in the case that the CCI of the copied AV data is “CopyOnce,” the AV data cannot be reproduced in a place where it is recordedfor the backup and it cannot be reproduced unless it is returned to theoriginal hard disk 83.

That is to say, the hard disk apparatus 83 of the present embodimentrecords the AV data of “Copy Never” which can be reproduced only once.

The AV data of which the CCI is “Copy Never” is not permitted to berecorded and therefore, it is viewed and listened to only during thetime it is broadcast.

By using the hard disk apparatus 83 of the present embodiment, however,the AV data can be viewed and listened to during a time that isdifferent from the time when it is broadcast, while the intention of thecopyright holder is protected.

In addition, the AV data of which the CCI is “Copy Once” is permitted tobe copied once. That is to say, when the AV data of “Copy Once” isrecorded once, this AV data can only be reproduced from the apparatus inwhich the AV data is recorded.

By using the hard disk apparatus 83 of the present embodiment, however,the AV data of “Copy Once” can be copied only once while remaining asthe CCI of “Copy Once” and, therefore, the AV data can be moved toanother recording and reproduction apparatus while protecting theintention of the copyright.

Here, though in the present embodiment when the AV data for therecording unit is reproduced the reproduction information managementmeans 80 makes a notification of this reproduction information to thecontrol means 82 and when the AV data for the recording unit isreproduced the reproduction information for this portion is set ascompletion of reproduction and thereby the hard disk apparatus 83 of thepresent embodiment is described of being able to reproduce only once theAV data of which the CCI is “Copy Never” the invention is not limited tothis. A method where the reproduction information management means 80updates the reproduction information may be as follows.

That is to say, the reproduction information management means 80 maycount the number of times that the AV data for the recording unit isreproduced so that the reproduction information of the AV data for thisrecording unit may be set as completion of reproduction only after ithas been reproduced for a predetermined number of times, for example,five times.

In addition, the reproduction information management means 80 may countthe number of times where a portion of one piece of AV data that isrecorded in each recording unit is reproduced so that the reproductioninformation management means 80 may set the portion of the reproductionmanagement information that is recorded in the entire recording units ofthis piece of AV data as completion of reproduction at the point in timewhen the entire portions that are recorded in the entire recording unitsof one piece of AV data are reproduced. In such a configuration, thehard disk apparatus 83 can reproduce a portion of the AV data of whichthe CCI is “Copy Never” as many times as desired and the reproductionbecomes impossible only at the point in time when the entirety of the AVdata is reproduced.

Furthermore, though in the present embodiment, the AV data of which theCCI is “Copy Never” is described as becoming unreproducible after apredetermined time has elapsed since the AV data is recorded, theinvention is not limited to this, but rather, the AV data of which theCCI is “Copy Never” may become unreproducible depending on the moneyimposing condition. As for such a money imposing condition, there is acondition such that the AV data of which the CCI is “Copy Never” becomesreproducible in the case that a payment procedure of a predeterminedamount of money is carried out when the AV data is recorded while itbecomes unreproducible in the case that such a payment procedure is notcarried out.

Furthermore, though the present embodiment is described such that the AVdata of which the CCI is “Copy Once” is controlled to continue to becopied in the case that the copy information is not copied and only inthe case that the apparatus wherein the AV data of that portion isrecorded is an apparatus wherein the above data is recorded for abackup, the invention is not limited to this, but rather, when apredetermined time has passed after the AV data of which the CCI is“Copy Once” is recorded this recorded AV data or the key used for theencryption at the time when this data is recorded may be erased.

The hard disk apparatus 83 of the present embodiment records the AV dataof which the CCI is “Copy Never” or reproduces only once the AV data ofwhich the CCI is “Copy Once” so that the CCI remains “Copy Once” in theabove manner and, therefore, the copyright can be interpreted as beingbreached even while the intention of the copyright holder is said to beprotected. That is to say, in the case that the CCI is “Copy Never,” itmeans that copying cannot be carried out by any means. Therefore, theutilization of the expanded CCI wherein the meaning of the CCI isexpanded in such a manner is at present under investigation. In theexpanded CCI, the meanings of “Copy Never” or “Copy Once” can beinterpreted as being expanded. The hard disk apparatus 83 of the presentembodiment can carry out the above described operation by using theexpanded CCI in place of the conventional CCI as described in the above.In the case that the hard disk apparatus 83 of the present embodimentcarries out the above described operation by using the expanded CCI insuch a manner, a breach of copyright is not committed.

When the hard disk apparatus 83 of the present embodiment is used insuch a manner, the AV data that is not permitted to be recorded can beviewed and received at an arbitrary time other than the time when it isbroadcast. In addition, it can be utilized as a backup apparatus sincethe AV data that is permitted to be copied only once can be transferredto another recording apparatus.

Here, viewing and listening to, or backing up, the AV data that is notpermitted to be recorded during an arbitrary time other than the timewhen it is broadcast is further described in detail in the followingembodiments.

Here, a variety of the modifications described in the first embodimentis of course possible in the hard disk apparatus 83 of the presentembodiment.

Furthermore, though the hard disk apparatus 83 of the present embodimentis described to be provided with the encryption means 11 and thedecryption means 12, the encryption means and the decryption means thatare described after the description of the first embodiment may be used.

Furthermore, the data of the present invention is not limited to the AVdata in the present embodiment. It may be document data or image datasent through the Internet, or the like or a computer program such as agame software or a document processing software sent through theInternet, or the like. In summary, the data of the present invention maybe any data that can be utilized by recording in the disk of the presentinvention and by reproducing from the disk of the present invention.

Furthermore, the interface of the present invention is not limited tothe IEEE 1394 interface in the present embodiment, but rather, may be aninterface of the USB.

Furthermore, the disk of the present invention is not limited to themagnetic disk medium in the present embodiment, but rather, may be anoptical disk medium or an optical magnetic disk medium. In summary, thedisk of the present invention may be any recording medium wherein thedata can only be accessed at random at the time of recording and/or atthe time of reproduction.

Furthermore, the copy permission information of the present invention isnot limited to the CCI or the expanded CCI in the present embodiment,but rather, may be any information that only shows the permission withrespect to the copying of the data.

Here, though in the above embodiments, the values of the CCI added tothe AV data are described to include “Copy Never,” “Copy Once,” “No MoreCopy” and “Copy Free,” in the below described eighth to eleventhembodiments, the AV data of which the value of the CCI is any of “CopyNever,” “Copy Once” or “No More Copy” is collectively dealt with as acopy prohibition data. In addition, to which of the above described“Copy Never,” “Copy Once” or “No More Copy” the CCI of the copyprohibition data corresponds is individually described in the eighth tothe eleventh embodiments.

(Eighth Embodiment)

Next, the configurations of an AVHDD 1001 and an archive device 1002 ofthe eighth embodiment of the present invention are described.

FIG. 21 shows a block diagram of the AVHDD 1001 and the archive device1002 according to the eighth embodiment of the present invention. Here,FIG. 21 shows an STB (set top box) 1003 for convenience of description.

Now, the AVHDD 1001 of the eighth embodiment of the present inventionis, as shown in FIG. 21, formed of an encryption means 1004 forencrypting data from an STB 1003 with an encryption key specific to theAVHDD 1001, a first recording means 1005 for recording the dataencrypted by the encryption means 1004 in a recording medium within astorage means 1006, the storage means 1006 for storing data, a movemeans 1007 for moving the data stored in the storage means 1006 to thearchive device 1002 and a reproduction means 8 for decrypting andreproducing the data from the archive device 1002 encrypted with theencryption key specific to the AVHDD 1001. Here, the storage means 1006has a first recording medium for recording data and data is recorded inthis first recording medium.

Here, in the “embodiments of the invention” the AVHDD is used as a wordrepresenting an apparatus for recording or reproducing data such asaudio, video, or the like, by using a hard disk drive (HDD).

Next, the archive device 1002 according to the eighth embodiment of thepresent invention is formed, as shown in FIG. 21, of a second recordingmeans 1009 for recording data from the AVHDD 1001 in a second recordingmedium 1010, the second recording medium 1010 and a transmission means1011 for reading out the data recorded in the second recording medium1010 and for transmitting it to the AVHDD 1001. Here, as for the archivedevice 1002, for example, a DVD apparatus or a D-VHS apparatuscorrespond to this. In the present embodiment, a DVD apparatus is usedfor the description as an example of the archive device 1002.Accordingly, a DVD corresponds to an example of the second recordingmedium 1010.

Here, the STB 1003 is a means of receiving data from, for example, abroadcast station so as to output the data to the AVHDD 1001 and ofreproducing data from the AVHDD 1001, wherein the reproduced data isdisplayed on a display connected to the STB 1003 in the case that it isvideo data or the reproduced data is outputted from a speaker connectedto the STB 1003 in the case that it is audio data. Here, the display andthe speaker are not shown in the figures.

In addition, in the eighth embodiment, the AVHDD 1001 is used as anexample of the data processing apparatus and the archive device 1002 isused as an example of the recording and reproduction apparatus accordingto the present invention, respectively.

In addition, the first recording medium within the storage means 1006 ofthe AVHDD 1001 may be a removable recording medium or a stationaryinstalled-type recording medium. In the same manner, the secondrecording medium 1010 within the archive device 1002 may be a removablerecording medium or a stationary installed-type recording medium.

In addition, the connection between the AVHDD 1001 and the archivedevice 1002 may be carried out via an interface according to the IEEE1394 standard or may be carried out via an interface according to theIDE standard. Or it may be carried out via another interface. As for theconnection between the AVHDD 1001 and the STB 1003, it may be carriedout via any interface.

Next, the operations of the AVHDD 1001 and the archive device 1002according to the eighth embodiment of the present invention aredescribed.

For convenience of the following description, the recording capacity ofthe first recording medium within the storage means 1006 of the AVHDD1001 is assumed to be nearing the limit and is in the condition whereinnew data from the STB 1003 cannot be stored unless some data isoverwritten, or is deleted, while the user has instructed the AVHDD 1001as well as the archive device 1002 to move the data within the storagemeans 1006 to the second recording medium 1010 within the archive device1002.

Here, move of data means to move data recorded in, for example, thefirst recording medium to another, the second, recording medium so thatthe moved data does not remain in the first recording medium after themove.

In addition, for convenience of the following description, the datamoved from the AVHDD 1001 to the archive device 1002 is encrypted by theencryption means 1004 using the encryption key specific to the AVHDD1001 and is recorded in the first recording medium within the storagemeans 1006 by means of the first recording means 1005. In addition, theabove data that is the object moved is copy prohibited data that isprohibited from being copied for copyright protection while the move toanother recording apparatus is permitted.

Here, the move means 1007 reads out the copy prohibited data, which hasbeen encrypted with the encryption key specific to the AVHDD 1001, fromthe first recording medium within the storage means 1106 and transmitsit to the archive device 1002. When the move means 1007 transmits(moves) the copy prohibited data in such a manner, the move means 1007outputs the copy prohibited data as data that can be copied only once.

Then, in the archive device 1002, the second recording means 1009records the copy prohibited data from the AVHDD 1001 in the secondrecording medium 1010. Here, the data transferred to the archive device1002 by the move means 1007 is transferred to the archive device 1002,as remaining encrypted, without being decrypted in the AVHDD 1001.Accordingly, the data recorded in the second recording medium 1010 bythe second recording medium 1009 is copy prohibited data that isencrypted by using the encryption key specific to the AVHDD 1001.

Next, a case is described wherein the encrypted copy prohibited data,which is recorded in the second recording medium 1010, is reproduced. Asshown in FIG. 21 the archive device 1002 is not provided with a means ofdecrypting and of reproducing the encrypted copy prohibited data and,therefore, it is necessary to move the data again to the reproductionmeans 1008 of the AVHDD 1001 that can decrypt and reproduce the copyprohibited data.

Therefore, in the case that the encrypted copy prohibited data, which isrecorded in the second recording medium 1010, is reproduced, thetransmission means loll reads out the data recorded in the secondrecording medium 1010, which is transmitted to the AVHDD 1001 and, then,in the AVHDD 1001, the reproduction means 1008 decrypts and reproducesthe encrypted copy prohibited data.

The decrypted and reproduced data is outputted at the STB 1003, which isdisplayed on the display connected to the STB 1003 in the case of videodata and is outputted from the display connected to the STB 1003 in thecase of audio data.

Even in the case that the recording capacity of the first recordingmedium within the storage means 1006 of the AVHDD 1001 has almostreached to the limit in the above described manner, the data within thestorage means 1006 can be moved to another recording medium withoutdeleting the data by, for example, overwriting or the like the data soas to gain the merit that the data transferred afterward can bereproduced.

In addition, even in the case that media in the same form as of thesecond recording medium 1010, which corresponds to the archive device1002, is illegally copied by a large amount and then is delivered, thedata can only be reproduced by the AVHDD 1001 since the data recorded inthis media is the data encrypted by the encryption means 1004 of theAVHDD 1001 by using the encryption key specific to the AVHDD 1001 and,therefore, the copy prohibited data that is the data of the object forcopyright protection can be moved to another apparatus, that is to say,the archive device 1002 while protecting the copyright. Accordingly, asafe data move can be implemented. Here, a plurality of encryption keysspecific to the produced AVHDD 1001 differ, respectively.

Here, though, in the above described embodiment, the copy prohibiteddata is encrypted by the encryption means 1004 of the AVHDD 1001 byusing the encryption key specific to the AVHDD 1001, the copy prohibiteddata is not limited to the data that is encrypted by the encryptionmeans 1004. For example, at a production stage of the AVHDD 1001, thecopy prohibited data encrypted by using the encryption key that isparticular to the AVHDD 1001 may be recorded in the first recordingmedium within the storage means 1006.

In addition, though, in the above described embodiment, the copyprohibited data is recorded in the first recording medium within therecording means 1006 after being encrypted by the encryption means 1004,the encryption means 1004 may be provided between the storage means 1006and the move means 1007 so that the copy prohibited data is encrypted byusing the encryption key specific to the AVHDD 1001 at the time when itis moved by means of the move means 1007. In summary, the copyprohibited data that is to be transferred by the move means 1007 may beany data that is encrypted by using the encryption key specific to theAVHDD 1001, at least, at the time when being outputted from the AVHDD1001.

In addition, in the present embodiment, the copy prohibited data is datathat is allowed to be transferred to another recording apparatus andthat is prohibited from being copied, wherein the “copy prohibited data”in “Embodiments of the Invention” includes the data represented as “01”in 2 bits meaning “prohibition of further copying” and the datarepresented as “11” in 2 bits meaning “absolute copy prohibition.”

In addition, the transmission means 1011 in the above embodimentdescribed in reference to FIG. 21 may be replaced with a high speedtransmission means 1015 that transmits the data recorded in the secondrecording medium 1010 to the AVHDD 1001 at a speed N (N is a positivenumber that exceeds 1) times as fast as the conventional speed as shownin FIG. 22. In this case, the AVHDD 1001 of FIG. 21 is replaced with anAVHDD 1012 that is further provided with a buffer 1014 as a data storagemeans so that the data from the high speed transmission means 1015 istemporarily stored in the buffer 1014 and, then, the temporarily storeddata can be reproduced in the reproduction means 1008.

Thus the merit is gained that a data transfer is carried out from thearchive device 1013 to the AVHDD 1012 at the speed N times as fast asthe standard (high speed) and the data can be normally reproduced in theAVHDD 1012. Here, the buffer 1014 may be provided within the storagemeans 1006. In addition, “the speed N times as fast as the conventionalspeed” means a speed faster than the data reproduction speed that isrequired when the reproduction means 1008 reproduces data that is viewedand listened to by the user.

Here, though, in the example described in reference to FIG. 22, a highspeed transmission means 1015 is provided with the archive device 1013so that data is transferred from the archive device 1013 to the AVHDD1012 at the speed N time as fast as the conventional speed (high speed),the move means 1007 of the AVHDD may be replaced with a high speed movemeans of moving the data to the archive device at the speed N (N is apositive number that exceeds 1) times as fast as the conventional speed.In this case, it is preferable to provide a buffer that temporarilystores data in the archive device. In the case that a high speed movemeans is provided in the AVHDD in such a manner, there is the merit thatthe data move can be carried out from the AVHDD to the archive devicefor a short period of time. In addition, in the below described AVHDD inEmbodiment 9, effects are gained that a data move can be carried out fora short period of time in the case that a high speed move means isprovided in place of the move means.

In addition, though in the above described embodiment, the archivedevice 1002 is not provided with a means of decryption and ofreproducing the encrypted data by using the encryption key specific tothe AVHDD 1001, the archive device 1002 may be replaced with an archivedevice 1016 that is provided with a decryption and reproduction means1017 for decrypting and reproducing the encrypted data by using theencryption key specific to the AVHDD 1001 as shown in FIG. 23 so thatthe encrypted data may be decrypted and reproduced by using theencryption key specific to the AVHDD 1001 in the archive device 1016without a data transmission to the AVHDD 1001.

In the case that the encrypted data can be decrypted and reproduced byusing the encryption key specific to the AVHDD 1001 in the archivedevice 1016 in the above manner, the problem is solved that the archivedevice 1002 and the AVHDD 1001 must be connected to each other only forreproducing the data.

Here, the encryption key specific to the AVHDD 1001 becomes necessary inorder for the decryption and reproduction means 1017 of the archivedevice 1016 to decrypt and reproduce the encrypted data and, therefore,an IC card slot may be provided in advance in the archive device 1016 sothat in the case that the IC card 1018 wherein the encryption keyspecific to the AVHDD 1001 is recorded is inserted to the IC card slotas shown in FIG. 23, the decryption and reproduction means 1017 acquiresthe encryption key specific to the AVHDD 1001 from the IC card 1018 soas to decrypt and reproduce the encrypted data by using this encryptionkey.

In addition, in the case that the IC card 1018 is used, in addition tothe decryption and reproduction means 1017, a key reproduction means ofreproducing the IC card 1018 may be provided in the archive device 1016.In addition, a key memory means of storing the encryption key specificto the AVHDD 1001 from the IC card 1018 may be provided in the archivedevice 1016. In the case that a key memory means is provided in thearchive device 1016 in such a manner, the problem can be avoided thatthe IC card 1018 must be inserted into the IC card slot whenever theencrypted data is decrypted and is reproduced by using the encryptionkey specific to the AVHDD 1001 that is recorded in the second recordingmedium 1010. Here, as for the key recorded in the IC card 1018, a secretkey and a public key can be combined in order to prevent the leakage ofthe key.

In addition, though, in the above description, the decryption andreproduction means 1017 acquires the encryption key specific to theAVHDD 1001 directly or indirectly from the IC card 1018, the decryptionand reproduction means 1017 may acquire the encryption key from a keydisk or a key cassette, in place of the IC card 1018, wherein theencryption key specific to the AVHDD 1001 is recorded or hidden. Here,the encryption key specific to the AVHDD 1001 may be recorded in thesecond recording medium 1010. In this case, the IC card 1018, the keydisk and the key cassette become unnecessary.

In addition, instead of using the IC card 1018, the key disk or the keycassette, a means of transmitting the encryption key specific to theAVHDD 1001 is provided in the AVHDD 1001 and a means of receiving theencryption key from the AVHDD 1001 is provided in the archive device1016 so that the decryption and reproduction means 1017 decrypts andreproduces the encrypted data by using the transmitted encryption key.

In addition, though in the above described embodiment, the AVHDD 1001unconditionally moves the encrypted data to the archive device 1002 asshown in FIG. 21, as shown in FIG. 24, the second recording medium 1010of the archive device 2 of FIG. 21 may be replaced with the secondrecording medium 1021 wherein the certification information thatindicates the recording medium corresponding to the AVHDD 1019 isrecorded and, at the same time, the AVHDD 1001 maybe replaced with theAVHDD 1019 wherein a judgment means 1020 for judging whether or not thesecond recording medium 1021 is a recording medium corresponding to theAVHDD 1019 is provided so that the move means 1007 moves data from theAVHDD 1019 to the archive device 1002 only in the case that the judgmentmeans 1020 judges that the second recording medium 1021 is the recordingmedium corresponding to the AVHDD 1019.

Here, the judgment means 1020 judges that the second recording medium1021 is the recording medium corresponding to the AVHDD 1019 in the casethat the certification information is recorded in the second recordingmedium 1021 and judges that the second recording medium 1021 does notcorrespond to the AVHDD 1019 in the case that the certificationinformation is not recorded.

In addition, the second recording medium 1021 wherein the certificationinformation is recorded may be a disk of which the color of the surfacediffers from the color of the surface of the recording medium, whereinthe certification information is not recorded in order to distinguishthe second recording medium wherein the certification information isrecorded from the recording medium wherein the certification informationis not recorded and, moreover, the recording medium wherein thecertification information is recorded is a recording medium forcopyright protected information and, therefore, may be more expensive bya predetermined amount than the recording medium wherein thecertification information is not recorded. Then the entirety, or aportion of, the difference between the recording medium wherein thecertification information is recorded and the recording medium whereinthe certification information is not recorded may be returned to thecopyright holder, which may be an individual or an organization.

Here, instead of the configuration wherein in the case that the secondrecording medium 1021 is a recording medium corresponding to the AVHDD1019 data is transferred from the AVHDD 1019 to the archive device 1002,in the case that the archive device 1002 is an apparatus correspondingto the AVHDD 1019 data may be moved from the AVHDD 1019 to the archivedevice 1002. In this case, the AVHDD 1019 is provided with a judgmentmeans that judges whether or not the archive device 1002 is an apparatusthat corresponds to the AVHDD 1019.

In addition, when a management apparatus having a fee imposing abilityconcerning, at least, the move of the copy prohibited data is confirmedto be connected to the interface to which AVHDD 1001 and the archivedevice 1002 are connected, the transfer means 1007 of the AVHDD 1001 maytransfer the copy prohibited data to the archive device 1002. Here, anSTB can be cited as an example of the management apparatus.

In addition, in the above described embodiment the copy prohibited datais moved from the AVHDD to the archive device. That is to say, after thecopy prohibited data is moved to the archive device, the copy prohibiteddata is deleted from the AVHDD. However, a case may be consideredwherein the copy prohibited data cannot be processed in the archivedevice and, therefore, in some cases it is preferable that the copyprohibited data be allowed to remain in the AVHDD as a backup.

In this case, when the move means 1007 of each of the AVHDDs in theabove described embodiment is replaced with a copy means of copying thecopy prohibited data in the archive device, the copy prohibited data istransmitted to the archive device and, at the same time, the copyprohibited data can be stored as a backup within the AVHDD so as toproduce the merit wherein the copy prohibited data stored in the AVHDDas a backup can be utilized even in the case that the copy prohibiteddata are not able to be processed in the archive device.

Here, as one example of the configuration of the AVHDD that is providedwith a copy means, FIG. 28 shows the case wherein the AVHDD 1001 that isprovided with a move means 1007, shown in FIG. 21, is replaced with theAVHDD 1081 that is provided with a copy means 1080 instead of the movemeans 1007.

(Ninth Embodiment)

Next, the configurations of an AVHDD 1022 and an archive device 1023according to the ninth embodiment of the present invention aredescribed.

FIG. 25 shows a block diagram of the AVHDD 1022 and the archive device1023 according to ninth embodiment of the present invention. Here, forconvenience of description, FIG. 25 also shows the STB 1003 in the samemanner as in FIG. 21 of the above described eighth embodiment.

Now, the AVHDD 1022 according to the ninth embodiment of the presentinvention is formed, as shown in FIG. 25, of a third recording means1024 of recording data from the STB 1003 in a recording medium within astorage means 1025, the storage means 1025 for storing data, decryptionmeans 1026 for converting data stored in the storage means 1025 into aplain sentence and a move means 1027 for moving the data that isconverted into a plain sentence by means of the decryption means 1026and that is stored in the storage means 1025 into the archive device1023.

An archive device 1023 according to the ninth embodiment of the presentinvention is formed of, as shown in FIG. 25, an encryption means 1028for encrypting the data from the AVHDD 1022 by using the encryption keyspecific to the archive device 1023, a fourth recording means 1029 forrecording the data encrypted by the encryption means 1028 in a thirdrecording medium 1030, the third recording medium 1030 and areproduction means 1031 for decrypting and reproducing the data recordedin the third recording medium 1030 by using the encryption key specificto the archive device 1023. Here, as for the archive device 1023, forexample, a DVD apparatus or a D-VHS apparatus correspond to this. A DVDapparatus is used as an example of the archive device 1023 and a DVD isused as an example of the third recording medium 1030 in the presentembodiment.

In addition, in the ninth embodiment an AVHDD 1022 is used as oneexample of the data processing apparatus of the present invention and anarchive device 1023 is used as one example of the recording andreproduction apparatus, respectively.

In addition, the recording medium within the storage means 1025 of theAVHDD 1022 may be a removable recording medium or may be a stationaryinstalled-type recording medium. A third recorded medium 1030 within thearchive device 1023 may be a removable recorded medium or may be astationary installed-type recording medium in the same manner.

In addition, the connection between the AVHDD 1022 and the archivedevice 1023 may be effected via any interface in the same manner as inthe eighth embodiment described in reference to FIG. 21.

Next, the operations of the AVHDD 22 and the archive device 23 accordingto the ninth embodiment of the present invention are described.

It is assumed that the user directs the AVHDD 1022 and the archivedevice 1023 to transfer data within the storage means 1025 to the thirdrecorded medium 1030 within the archive device 1023. Here, the move ofdata means, as described in the eighth embodiment, that, for example,the data recorded in the first recording medium is moved into another,the second recording medium so that the moved data does not remain inthe first recording medium after the move.

In addition, for the convenience of the description below, the data thatis the object moved is copy prohibited data that is allowed to be movedto another recording apparatus and is prohibited from being copied forcopyright protection and is recorded in the recording medium within thestorage means 1025 by means of the third recording medium 1024.

Here, at this time, a decryption means 1026 converts data stored in thestorage means 1025 into plain sentences while a move means 1027 readsout the copy prohibited data of a plain sentence from the recordingmedium within the storage means 1025 and transmits it to the archivedevice 1023. In such a manner when the move means 1027 transmits (moves)the copy prohibited data, the move means 1027 outputs the copyprohibited data only once as data of which copying is allowable.

Then, in the archive device 1023, the encryption means 1028 encrypts thedata from the AVHDD 1022 by using the encryption key specific to thearchive device 1023 and the fourth recording means 1029 records the datathat is encrypted by the encryption means 1028 in the third recordingmedium 1030. Here, the data is treated as copy prohibited data at thetime when it is inputted to the archive device 1023 or at the time whenit is recorded in the third recording medium 1030.

Here, transmission data in the transmission path of the data from theAVHDD 1022 to the archive device 1023 may be, for example, protected bythe DTCP.

Next, a case is described wherein the encrypted copy prohibited datathat is recorded in the third recording medium 1030 is reproduced byusing the encryption key specific to the archive device 1023. In thiscase, the reproduction means 1031 reproduces copy prohibited datarecorded in the third recording medium 1030 by using the encryption keyspecific to the archive device 1023.

Since the archive device 1023 encrypts and records data by using theencryption key specific to the archive device 1023 in the above manner,there is the merit that the data recorded in the archive device 1023 canbe reproduced.

Here, though in the above described embodiment the encryption means 1028of the archive device 1023 encrypts the copy prohibited data from theAVHDD 1022 by using the encryption key specific to the archive device1023, in the case that the encryption key is recorded in the thirdrecording medium 1030, the encryption means 1028 may encrypt the copyprohibited data from the AVHDD 1022 by using the encryption key recordedin the third recording medium 1030. In this case, the reproduction means1031 reproduces the copy prohibited data by using the encryption keythat is recorded in the third recording medium 1030.

In addition, though in the above described embodiment the data movedfrom the AVHDD 1022 to the archive device 1023 is plain sentence data,the moved data may be the data encrypted by using the encryption keyspecific to the archive device 1023 or may be the data encrypted by theencryption key that is recorded in the third recording medium 1030 inthe case that the encryption key is recorded in the third recordingmedium 1030.

In this case, the AVHDD 1022 is provided with the encryption means ofencrypting the copy prohibited data by using the encryption key specificto the archive device 1023 or by using the encryption key recorded inthe third recording medium 1030. In addition, the AVHDD 1022 is providedwith a means of acquiring the encryption key specific to the archivedevice 1023 from the archive device 1023 and a means of acquiring theencryption key described in the third recording medium 1030 from thearchive device 1023. Here, the encryption means 28 becomes unnecessaryin the archive device 1023.

In addition, the data moved from the AVHDD 1022 to the archive device1023 may be data in a format used in the archive device 1023. In thiscase, the AVHDD 1022 can be provided with a format conversion means thatconverts the transferred data into data in a format for the archivedevice 1023. In addition, when data is recorded within the storage means1025 in the AVHDD 1022, the data may be recorded in a format used in thearchive device 1023.

In addition, as described in the eighth embodiment in reference to FIG.24, the AVHDD 1022 is provided with a judgment means of judging whetheror not the third recording medium 1030 is a recording mediumcorresponding to the AVHDD 1022 so that the move means 1027 may move thecopy prohibited data that is in plain sentences or that is encrypted tothe archive device 1023 in the case that the third recording medium 1030is judged to be a recording medium corresponding to the AVHDD 1022according to the above judgment means.

Here, in the case that a key is attached to the third recording medium1030 that shows that the third recording medium 1030 is a recordingmedium corresponding to the AVHDD 1022, the judgment means provided inthe AVHDD 1022 may judge whether or not the third recording medium 1030is a recording medium corresponding to the AVHDD 1022 by utilizing thekey that is attached to the third recording medium 1030.

In addition, instead of the configuration wherein data move is carriedout by judging whether or not the third recording medium 1030 is arecording medium corresponding to the AVHDD 1022, data transfer maybecarried out by judging whether or not the archive device 1023 is anapparatus corresponding to the AVHDD 1022. In this case, AVHDD 1022 isprovided with a judgment means that judges whether or not the archivedevice 1023 is an apparatus corresponding to the AVHDD 1022 and the movemeans 1027 may move the copy prohibited data that is of plain sentenceor that is encrypted to the archive device 1023 in the case that thearchive device 1023 is judged to be an apparatus corresponding to theAVHDD 1022 according to above judgment means.

Here, in the case that the archive device 1023 has a key that shows thatthe archive device is an apparatus corresponding to the AVHDD 1022, thejudgment means provided in the AVHDD 1022 may utilize the key that thearchive device 1023 has so as to judge whether or not the archive device1023 is an apparatus corresponding to the AVHDD 1022.

In addition, when a management apparatus that has a fee imposing abilityconcerning the move of, at least, copy prohibited data is confirmed tobe connected to the interface to which the AVHDD 1022 and the archivedevice 1023 are connected, the move means 1027 of the AVHDD 1022 maytransfer the copy prohibited data to the archive device 1023. Here, anSTB can be cited as an example of the management apparatus.

In addition, the AVHDD in the eighth embodiment and the AVHDD 2 may,respectively, be provided with a means of transmitting fee impositioninformation concerning the move of data to a management apparatus formanaging each of the AVHDDs at the time when the data move is carriedout. In addition, an STB 1003 in which a means of imposing a fee isintegrated can be used as an example of the management apparatus.

In addition, in the above described embodiment, the copy prohibited datais moved from the AVHDD to the archive device. That is to say, the copyprohibited data is deleted from the AVHDD after the copy prohibited datais moved to the archive device. However, there may be a case wherein thecopy prohibited data cannot be processed in the archive device and,therefore, in some cases it is preferable to allow the copy prohibiteddata to remain in the AVHDD as a backup.

In this case, when the move means 1027 of the AVHDD of the abovedescribed embodiment is replaced with a copy means of copying the copyprohibited data in the archive device, the copy prohibited data can betransmitted to the archive device and the copy prohibited data can bestored in the AVHDD as a backup so as to produce the merit that the copyprohibited data stored in the AVHDD as a backup can be utilized even inthe case that the copy prohibited data cannot be processed in thearchive device.

Here, as one example of the configuration of the AVHDD that is providedwith a copy means, FIG. 29 shows a case wherein the AVHDD 1022, which isprovided with the move means 1007 shown in FIG. 24, is replaced with theAVHDD 1091 that is provided with the copy means 1090 instead of the movemeans 1027.

(Tenth Embodiment)

Next, an encryption data decrypting and recording system according tothe tenth embodiment of the present invention is described.

FIG. 30 shows the configuration of the encryption data decrypting andrecording system according to the present tenth embodiment. As shown inFIG. 30, the encryption data decrypting and recording system accordingto the present tenth embodiment is formed of five recording apparatuses1100 a to 1100 e and a decrypting and recording apparatus 1101.

FIG. 31 shows the configuration of each of the recording apparatuses1100 according to the present tenth embodiment. As shown in FIG. 31,each recording apparatus 1100 has a recording means 1102 and an outputmeans 1103 that outputs data recorded in the recording means 1102. Here,the data recorded in the recording means 1102 is data gained byencrypting the copy prohibited data that is prohibited from being copiedand the encrypted copy prohibited data of the same content is recordedin the recording means 1102 of each recording apparatus 1100.

Next, FIG. 32 shows the configuration of the decrypting and recordingapparatus 1101 according to the present tenth embodiment. As shown inFIG. 32, the decrypting and recording apparatus 1101 has a decryptionmeans 1104 and a recording means 1105. Here, the decryption means 1104is a means of decrypting the encrypted copy prohibited data that isoutputted from the recording apparatus 1100 while the recording means1105 is a means of recording the encrypted copy prohibited data orunencrypted copy prohibited data, which is data that has the samecontent as that of the copy prohibited data recorded in the recordingapparatus 1100.

In addition, in the above described encryption data decrypting andrecording system according to the present tenth embodiment, though thedata of the same content is recorded in five recording apparatuses 1100a to 1100 e and in the decrypting and recording apparatus 1101,respectively, the encrypted copy prohibited data can only be decryptedby the decryption means 1104 of the decrypting and recording apparatus1101.

Accordingly, when the encryption data decrypting and recording systemaccording to the present tenth embodiment is used, effects are gainedthat copyright is protected while the data of which the copyright is tobe protected can be backed up.

Here, though in the encryption data decrypting and recording systemaccording to the above described embodiment, the recording apparatus1100 is provided with 1100 a to 1100 e, the number of the recordingapparatuses 1100 is not limited to 5. In summary, any plural number ofrecording apparatuses may exist.

(Eleventh Embodiment)

Next, an AVHDD 1032, according to the eleventh embodiment of the presentinvention is described. Here, transmission of data from the AVHDD 1032is described in the eleventh embodiment and the transmitted data isrecorded in the DVD 1037 of the DVD apparatus 1033.

FIG. 26 shows a block diagram of the AVHDD 1032 and the DVD apparatus1033 according to the eleventh embodiment of the present invention.

Now, the AVHDD 1032 according to the eleventh embodiment of the presentinvention is formed of, as shown in FIG. 26, a storage means 1034 ofstoring data and a transmission means 1035 of transmitting data storedin the storage means 1034 to the DVD apparatus 1033.

The DVD apparatus 1033 according to the eleventh embodiment of thepresent invention is formed of, as shown in FIG. 26, a fifth recordingmeans 1036 of recording data from the AVHDD 1032 in the DVD 1037 and areproduction means 1038 of reproducing data recorded in the fifthrecording means 1036.

Here, the AVHDD 1032 of the eleventh embodiment is used as one exampleof the data transmission apparatus of the present invention.

In addition, the connection between the AVHDD 1032 and the DVD apparatus1033 may be effected via any type of interface.

Next, the operations of the AVHDD 1032 and the DVD apparatus 1033according to the eleventh embodiment of the present invention aredescribed.

Here, the data transmitted by the AVHDD 1032 is assumed to be a streamformed of a plurality of data packets. FIG. 27 shows the configurationof a portion of this stream. This stream is, as shown in FIG. 27, astream formed of a plurality of blocks formed of five data packets D0,D1, D2, D3 and D4, wherein D0, D1, D2, D3 and D4 are, respectively, datapackets that are chronologically sequential in ascending order of numberand the data is encrypted in a chain manner so that each packet cannotbe reproduced unless the packet chronologically one before isreproduced.

Accordingly, when the data packets D0, D1 and D2 are picked up, the datapacket D0 is chronologically followed by the data packet D1, which isthen followed by the data packet D2 so that the data packet D1 is notreproduced unless the data packet D0 is reproduced while the data packetD2 is not reproduced unless the data packet D1 is reproduced.

As for the operation, at the time when the AVHDD 1032 transmits such astream to the DVD apparatus 1033, when the transmission means 1035 ofthe AVHDD 1032 transmits a stream stored in the storage means 1034 tothe DVD apparatus 1033, the data packets of each block forming thestream are transmitted in the order of D4, D3, D2, D1 and D0.

The fifth recording means 1036 in the DVD apparatus 1033 records thedata from the AVHDD 1032 in the DVD 1037.

When the data recorded in the DVD 1037 is reproduced the reproductionmeans 1038 reproduces the data packets in the order of D0, D1, D2, D3and D4 with respect to each block forming the stream and then reproducesthe entire stream.

The data packets transmitted from the AVHDD 1032 to the DVD apparatus1033 are transmitted in the order of D4, D3, D2, D1 and D0 in the abovemanner and, therefore, the block formed of the data packets D0, D1, D2,D3 and D4 is not reproduced unless D4, D3, D2, D1 and D0 are transmittedin the case that the power is cut off in the course of data transmissiondue to a power failure, or the like, so that the situation wheretransmission data is decrypted in another apparatus can be avoided evenin the case that the transmission data is leaked to the apparatus.

Here, though in the above described embodiment chain encryption of thedata packets D0, D1, D2, D3 and D4 is not described in detail, the datapackets D0, D1, D2, D3 and D4 that are encrypted in a chain manner maybe stored in the storage means 1034 of the AVHDD 1032 or the datapackets of each block may be encrypted in a chain manner at the timewhen the transmission means 1035 of the AVHDD 1032 transmits the streamby providing the AVHDD 1032 with a means of carrying out a chainencryption.

In addition, though in the above described embodiment the stream isformed of a plurality of blocks formed of five data packets D0, D1, D2,D3 and D4, the number of data packets that form each block is notlimited to five. In addition, the stream is not limited to a streamformed of a plurality of blocks. The stream may not be formed of aplurality of blocks, but rather, may be a stream formed of a pluralityof data packets. In this case, the transmission means 1035 transmits thedata packets forming the stream in the order from the rear to the head.

In addition, though in the above described embodiment the transmissionof the stream is described, the data packets D0, D1, D2, D3 and D4 areclosely observed and this results in finding that the data packets D1 toD4 are erased from the recording medium before the move of the streamafter the move of the data packets D4, D3, D2, and D1 has been completedand the data packet D0 is transferred after the above erasure has beencompleted and, then, the data packet D0 is erased from the recordingmedium before the transfer of the stream.

Here, in the above described eighth to eleventh embodiments, the AV dataof which the value of the CCI is any of “Copy Never,” “Copy Once” or “NoMore Copy” is collectively referred to as copy prohibited data while inthe following twelfth to sixteenth embodiments the content whereincopying of the AV data, or the like, of which the CCI is “Copy Never” isprohibited is referred to as copy prohibited content.

(Twelfth Embodiment)

FIG. 33 is a configuration diagram of a recording and reproductionapparatus according to the twelfth embodiment of the present invention.As shown in the figure, a judgment information detection means 2010 is ameans of detecting judgment information with respect to the copylimitation in broadcasting signals from the outside, a time informationacquisition means 2011 is a means of a acquiring time signals withrespect to time from broadcasting signals from the outside, a recordingand reproduction means 2012 is a means of recording and reproducingbroadcasting signals from the outside, a recording medium 2013 is ameans of storing broadcast data that can be implemented by a hard disk,or the like and that allows recording and reproduction at the same timeand allows a random access, a control input interface (hereinafter,control input I/F) 2015 is a means of receiving the control from theuser and a switching means 2016 is a means of receiving an input fromthe recording and reproduction means 2012 and a broadcast input from theoutside so as to select either of these and output it to the externalmonitor, or the like. In addition, in the recording medium 2013, therecording buffer 2014 is a region that exclusively records the data thatis restricted from being copied. Here, the broadcast that is dealt within the present embodiment is a digital broadcast using an MPEG transportstream or an MPEG program stream (hereinafter, referred to, in general,as MPEG stream) and means concerning the decoding process, and the like,are omitted. Each of the following embodiments is described in the samemanner. In addition, the judgment information detection means 2010, thetime information acquisition means 2011 and the recording andreproduction means 2012 are examples of recording means of the presentinvention.

The operation of the recording and reproduction apparatus according tothe twelfth embodiment of the present invention that has the abovedescribed configuration is described as follows.

First, the judgment information detection means 2010 refers to eachpacket forming a header or a data column when receiving an input of theMPEG stream from the outside and detects information concerningcopyright such as a copy guard or CCI (copy control information) so asto judge whether or not a copy prohibition or a copy restriction hasbeen placed on the inputted content. Here, it is assumed that only thecopy prohibited content that is prohibited from being copied isinputted.

Next, when the inputted MPEG stream is identified as the copy prohibitedcontent, the judgment information detection means 2010 outputs detectioninformation to the recording and reproduction means 2012. As examples ofdetection information, copyright information, a copy guard, and thelike, included in the MPEG stream are cited. The recording andreproduction means 2012 prepares to record the MPEG stream in therecording buffer 2014 within the recording medium 2013 based on thedetection information after the recording and reproduction meansreceives the detection information.

When an MPEG stream is inputted from the outside via the judgmentinformation detection means 2010, the recording and reproduction means2012 records the MPEG stream in the recording buffer 2014.

Next, the operation of recording in the recording buffer 2014 by therecording and reproduction means 2012 is described in detail. FIG. 34 isa time chart for describing the operation of the recording andreproduction apparatus according to the present twelfth embodiment. Asshown in the figure, as an example of the operation of the presentembodiment, it is assumed that a recording and reproduction apparatusaccording to the present embodiment is used in order to temporarilyrecord the amount of data that corresponds to a 90 minute period ofbroadcast time in the recording buffer 2014 and that the copy prohibitedcontent of the 120 minutes of broadcast time that is broadcast duringthe period of time of the live broadcast 2020 is viewed and listened tobased on the time shift reproduction after 90 minutes has elapsed sincethe broadcast starting time.

First, at the time when the broadcast starts, the recording andreproduction means 2012 starts recording data that form the copyprohibited content in the recording buffer 2014. After the broadcaststarting time, the recording and reproduction means 2012 keepssequentially recording the data in the recording buffer 2014 and doesnot carry out reproduction.

On the other hand, the time information acquisition means acquires timeinformation such as a PCR packet or a time stamp from the MPEG stream soas to start measuring the recording time at the point in time when therecording and reproduction means 2012 starts recording the copyprohibited content in the recording buffer 2014.

Next, after the period of time of recording 2021 (90 minutes) haselapsed according to the measurement by the time information acquisitionmeans 2011 since the broadcast starting time, the recording andreproduction means 2012 starts erasing the data recorded after thebroadcast starting time from the recording buffer 2014 while continuingthe sequential recording of the MPEG stream that is inputted from theoutside. Here, in this example of the operation, the time when theperiod of time of recording 2021 has elapsed since the broadcaststarting time is the viewing and listening starting time when theviewing and listening period of time 2024 starts due to the time shiftreproduction and, therefore, the recording and reproduction means 2012reproduces the recorded data before it is erased and outputs it to anexternal monitor via the switching means 2016.

That is to say, the data that corresponds to the portion 2022 a of thefirst 30 minutes (content that is broadcast during the period of time ofthe live broadcast 2020 a) from among the data recorded during theperiod of time of recording 2021 is reproduced (content viewed andlistened to during the viewing and listening period of time 2024 aaccording to the time shift reproduction) after 90 minutes has elapsedsince the broadcast starting time, that is when the viewing andlistening starting time according to the time shift reproduction and,after that, it is immediately erased.

Next, when the period of time of recording and reproduction 2022 a haselapsed since the viewing and listening starting time according to thetime shift reproduction, the recording and reproduction means 2012continues the sequential recording of the data until the broadcastcompletion time during the period of time of recording and reproduction2022 b and, at the same time, reproduction of the data that has alreadybeen stored in the recording buffer 2014 is continued so that itsucceeds the data portion 2022 a.

Next, at the time when the broadcast is completed, the recording andreproduction means 2012 stops the sequential recording of the data andimplements reproduction of the data recorded in the recording buffer2014 until the viewing and listening completion time (period of time ofreproduction 2023).

Here, in the above described operation, the reproduced data may bestored once in the recording buffer 2014 during the period of time ofrecording and reproduction 2022 b and during the period of time ofreproduction 2023 so as to be erased together after the viewing andlistening completion time and it is desirable to erase the dataimmediately after the reproduction in order to prevent the situationwhere the data is stored in the recording medium 2013 in the case thatthe power of the recording and reproduction apparatus is cut off due toan accident.

In addition, in the case that the time shift reproduction is not carriedout after the viewing and listening starting time, the recording andreproduction means 2012 erases the entire data recorded in the recordingbuffer 2014. Thereby, the copy prohibited content can be prevented frombeing reproduced in a form other than by time shifting.

In addition, though in the above description when the judgmentinformation detection means 2010 detects judgment information includedin the data of the copy prohibited content, the recording andreproduction means 2012 automatically starts the recording operation forthe time shift reproduction, the start of the recording operation of therecording and reproduction means 2012 may not be triggered by thejudgment information but, rather, may be carried out by control from theoutside (user) via the control input I/F 2015.

In addition, though in the above description the completion of theperiod of time of recording 2021 and the viewing and listening startingtime according to the time shift reproduction are set at the same timeand the operation of time shift reproduction of the copy prohibitedcontent and the operation of the erasure of the data that form this copyprohibited content are interlocked, the invention is not necessarilylimited to this but, rather, the viewing and listening starting time maybe set at an arbitrary time or viewing and listening may be carried outthrough a direct order to the recording and reproduction means 2012,without carrying out time setting, based on control from the controlinput I/F 2015 as long as the viewing and listening starting time iswithin the period of time of recording 2021 (period of time 2024 cwherein the time shift reproduction can be set at any time). At thistime in the case that a direct order of the time shift reproduction tothe recording and reproduction means 2012 is not carried out within theperiod of time of recording 2021, it is preferable for the recording andreproduction means 2012 to stop the recording operation (period of time2021 a in FIG. 35). In addition, at the same time, it is desirable tonot accept a direct order even in the case that the direct order fortime shift reproduction is again carried out.

In addition, in the case that the period of time of recording 2021 haselapsed in the above operation, though it is described above that therecording and reproduction means 2012 erases the data recorded after thebroadcast starting time from the recording buffer 2014 while continuingsequential recording of the MPEG stream that is inputted from theoutside, this data may be rewritten into an unreproducible condition,and in addition to that, the data may be maintained in the recordingbuffer 2014.

(Thirteenth Embodiment)

A recording and reproduction apparatus according to the thirteenthembodiment of the present invention uses a ring buffer as a recordingbuffer for recording the copy prohibited content.

FIG. 36 is a configuration diagram of a recording and reproductionapparatus according to the present thirteenth embodiment of the presentinvention. In the figure, the same symbols are attached to the sameparts as, or corresponding parts to, those in FIG. 33, of which thedescriptions are omitted. In addition, the ring buffer 2044 is a meansof temporarily recording a constant amount of data by repeating theoverwrite recording in the same region.

The operation of the recording and reproduction apparatus according tothe thirteenth embodiment of the present invention, which has aconfiguration as described above, is described as follows.

First, the operation wherein the judgment information detection means2010 refers to an MPEG program stream from the outside and the recordingand reproduction means 2012 records the copy prohibited content in thering buffer 2044 is carried out in the same manner as in the twelfthembodiment.

Next, the operation of recording in the ring buffer 2044 by therecording and reproduction means 2012 is described in detail. Asdescribed above, the ring buffer 2044 is a specific region on therecording means 2013 and carries out overwrite recording by returning tothe recording start position after a constant amount of data isrecorded. At this time, the size of the ring buffer 2044 may be set inadvance or may be set based on the detection information acquired fromthe judgment information detection means 2010 and, in either case, thesize of the ring buffer 2044 is set so that the entirety of the copyprohibited content, which becomes the object of recording, is notrecordable. For example, in the case that the broadcast time of the copyprohibited content is 120 minutes, the ring buffer 2044 is set to have acapacity corresponding to 90 minutes.

The recording and reproduction means 2012 starts the recording of thecopy prohibited content in the ring buffer 2044 that is set as describedabove.

Here, FIG. 37 is a time chart for describing the operation of therecording and reproduction apparatus according to the present thirteenthembodiment. In the following, in reference to FIG. 37, the operations ofthe recording and reproduction means 2012 and the ring buffer 2044according to the present thirteenth embodiment are described in detail.Here, as shown in the figure, the settings of each of the times and eachof the periods of time are the same as in the case of the twelfthembodiment, shown in FIG. 34.

First, at the time when a broadcast starts, the recording andreproduction means 2012 starts recording the data that forms the copyprohibited content in the ring buffer 2044. After the broadcast startingtime, the recording and reproduction means 2012 keeps sequentiallyrecording the data until the capacity set in the ring buffer 2044becomes full and does not carry out reproduction (period of time ofrecording 2051).

Next, after the period of time of recording 2051 has elapsed since thebroadcast starting time and the capacity set in the ring buffer 2044becomes full, the recording and reproduction means 2012 returns therecording head (ring buffer pointer) to the recording start positionfrom the recording position at the point in time during the period oftime of recording 2051 in the ring buffer 2044 so as to carry out a newoverwrite recording of the data.

In addition, in this operational example, since the completion of theperiod of time of recording 2051 is the same as the starting time of theperiod of time of viewing and listening 2054 according to the time shiftreproduction, the recording and reproduction means 2012 carries out anoverwrite recording of the MPEG stream that is inputted from the outsideand, at the same time, starts the reproduction of the data, immediatelybefore overwriting, that has been recorded since the broadcast startingtime. That is to say, the data that corresponds to the first 30 minuteportion 2052 a (content broadcast during the period of time of the livebroadcast 2050 a) from among the data that has been recorded during theperiod of time of recording 2051 is reproduced after 90 minutes haveelapsed since the broadcast starting time when viewing and listeningstarts according to the time shift reproduction and, then, is erasedthrough overwrite recording.

Then, the recording and reproduction means 2012 continues the sequentialrecording of data until the time of broadcast completion and, at thesame time, continues the data reproduction (period of time of recordingand reproduction 2052 b).

Next, at the time when the broadcast is completed, the recording andreproduction means 2012 stops overwrite recording of the data andimplements the reproduction of the data recorded in the ring buffer 2044until the completion time of the viewing and listening (period of timeof reproduction 2053).

Here, with respect to the above described operation, the data reproducedfrom the ring buffer 2044 may be once stored in the ring buffer 2044 soas to be collectively erased after the completion time of viewing andlistening and it is desirable to erase the data immediately afterreproduction in order to prevent the situation wherein the data remainsstored in the recording medium 2013 in the case where the power of therecording and reproduction apparatus is cut off due to an accident.

In addition, in the case that a time shift reproduction is not carriedout after the starting time of viewing and listening, the recording andreproduction means 2012 erases the entirety of the data recorded in thering buffer 2044. Thereby, the copy prohibited content can be preventfrom being reproduced in a form other than by time shifting.

In addition, though in the above described operation, the completion ofthe period of time of recording 2051 and the starting time of viewingand listening according to time shift reproduction are set at the sametime while the operation of the time shift reproduction of the copyprohibited content and the operation of the overwrite recording of thedata that form this copy prohibited content are interlocked, theinvention is not necessarily limited to this and as shown in FIG. 38 thestarting time of viewing and listening may be set at an arbitrary timeor viewing and listening may be carried out according to a direct orderto the recording and reproduction means 2012, without a setting of thetime, based on the control from the control input I/F 2015 as long asthe starting time of viewing and listening is within the period of timeof recording 2061 (period of time 2064 c wherein time shift reproductioncan be set at an arbitrary time). At this time, in the case that thedirect order for time shift reproduction to the recording andreproduction means 2012 is not carried out within the period of time ofrecording 2061, it is preferable for the recording and reproductionmeans 2012 to stop the recording operation (period of time 2061 a in thefigure). In addition, at the same time, it is desirable to set thesystem so that even in the case that the direct order for time shiftreproduction is carried out again, this direct order is not accepted.

In addition, though in the above described operation in the case thatthe period of time of recording 2061 has passed, the recording andreproduction means 2012 continues the sequential recording of the MPEGstream that is inputted from the outside while erasing the data recordedafter the broadcast starting time from the ring buffer 2014, the datamay be stored in the recording buffer 2014 after this data is rewrittento an unreproducible condition.

In addition, as for the recording position of the data in the ringbuffer at the time when the data is reproduced in the time shiftreproduction according to the present embodiment (1) the reproductionposition under the condition wherein overwrite recording is not carriedout in the ring buffer 2044 becomes the same position wherein therecording has started in the ring buffer 2044 and (2) the reproductionposition under the condition wherein overwrite recording is beingcarried out becomes located immediately after the position at the pointin time when the control of the reproduction operation is carried out(position wherein the last overwrite recording is carried out) in thering buffer 2044. That is to say, according to the time shiftreproduction, read out is performed in the order starting from theoldest data recorded in the ring buffer 2044 in either of the abovecases (1) or (2). In the example shown in FIG. 38, the above (1)corresponds to the case wherein the time shift reproduction is carriedout within the period of time 2064 d (30 minutes after the broadcaststarting time) and the reproduction start position is always determineduniquely to be point A in the figure. The above (2) corresponds to thecase wherein the time shift reproduction is carried out within theperiod of time 2064 e (from 30 minutes to 60 minutes after the broadcaststarting time) and the reproduction start position corresponds to thepresent position of the recording head (buffer pointer) of the ringbuffer during the period of time 2064 e.

(Fourteenth Embodiment)

A recording and reproduction apparatus according to the fourteenthembodiment of the present invention can selectively carry out time shiftreproduction of only the copy prohibited content in the case that abroadcast wherein copy prohibited content and content that may be copiedare mixed is received.

Since the configuration of the present embodiment is the same as in thetwelfth embodiment, FIG. 33 is referred to for description. In addition,FIG. 39 is a diagram for describing the operation of the recording andreproduction apparatus according to the present embodiment. Here, in thepresent embodiment the period of time when time shifting is possible isassumed to be set at 120 minutes instead of at 90 minutes as in theabove described embodiment. In the following, the operation in theembodiment of the present invention is described in reference to FIG.39.

In the MPEG stream 2070 that is inputted from the outside, copyprohibited content 2070 a and 2070 c that is prohibited from beingcopied and conventional content 2070 b and 2070 d that may be copied aremixed and the copy prohibited content 2070 a, 2070 b, copy prohibitedcontent 2070 c, 2070 d are inputted to the recording and reproductionapparatus in chronological order. The judgment information detectionmeans 2010 acquires judgment information included in the respectivecontent, which is outputted to the recording and reproduction means2012, while the time information acquisition means outputs timeinformation of respective content to the recording and reproductionmeans 2012. Based on these, the recording and reproduction means 2012that has acquired the judgment information and the time informationtemporarily records the copy prohibited content in the recording buffer2014 and records the conventional content in the recording region withinthe recording medium 2013, other than within the recording buffer, afterthe broadcast time of respective content has elapsed.

At this time, the input of content is in chronological order and,therefore, as shown in FIG. 39, copy prohibited content 2070 a isrecorded first and copy prohibited content 2070 c is recorded second inthe recording buffer 2014 while content 2070 b is recorded first andcontent 2070 d is recorded second in the recording medium 2013.

Copy prohibited content 2070 a and 2070 c that have been recorded withinthe recording buffer 2014 are sequentially reproduced in a time shiftmanner in the same manner as in the twelfth embodiment. After thecompletion of the time shift reproduction, data is deleted from therecording buffer 2014 or data is converted to the condition whereinreproduction is made impossible while the content 2070 b and 2070 drecorded in the recording medium 2013 can be permanently recorded.

Here, though in the above description the present embodiment can beimplemented in the recording and reproduction apparatus that has aconfiguration of the twelfth embodiment, it can also be implemented inthe same manner even in the case that it has the configuration of thethirteenth embodiment.

(Fifteenth Embodiment)

A recording and reproduction apparatus according to the fifteenthembodiment of the present invention encrypts the data of the copyprohibited content that is temporarily recorded so that the data isconverted to the condition that makes viewing and listening impossible.

FIG. 40 is a configuration diagram of a data concealment means 2080 usedin the recording and reproduction apparatus according to the fifteenthembodiment of the present invention. As shown in the figure, a recordingbuffer 2014 is the same means as the recording buffer of the twelfthembodiment, an encryption means 2081 is a means of encrypting the datainputted from the recording and reproduction means 2012 by using a timevariation key, a decryption means 2082 is a means of decrypting theencrypted data outputted from the recording buffer 2014, a timevariation key generation means 2083 is a means of generating a timevariation key used for the encryption means 2081 and the decryptionmeans 2082 and a key buffer 2084 is a means of temporarily storing thetime variation key.

The operation in the present embodiment having the above describedconfiguration is described below when data is inputted from therecording and reproduction means 2012 to the encryption means 2081, theencryption means 2081 encrypts the original data based on the timevariation key generated by the time variation key generation means 2083.The encrypted data is recorded in the recording buffer 2014.

On the other hand, the time variation key generation means 83 outputsthe time variation key, which is the same as the one that the encryptionmeans 2081 has acquired, to the key buffer 2084 and the key buffer 2084holds this.

Next, when the recording and reproduction means 2012 carries out timeshift reproduction and the encrypted data is outputted from therecording buffer to the encryption means 2082, the decryption meansacquires data necessary for the decrypting of the data from the keybuffer 2084 so as to decrypt this data.

In the above described operation, the key buffer that temporarily storesthe time variation key disappears when the data exceeds an amount thatis equal to the amount of time corresponding to the data capacity of therecording buffer 2014. Thereby, the data on which time shiftreproduction is not carried out is held within the recording buffer 2014in an encrypted form and it becomes impossible to view and listen to thedata even if it is possible to reproduce the data.

In order to make the time variation key disappear, the key buffer 2084is made to have, for example, a ring buffer configuration so that thekeys accumulated in the key buffer are overwritten by a new key. In theoperational example of the twelfth embodiment shown in FIG. 34, forexample, the capacity of the ring buffer is the same as for the periodof time of recording 2021.

In addition, a timer is separately provided so that a period of time ismeasured and the keys stored after the set time are sequentially erasedfrom the key buffer 2084 after a predetermined period of time haselapsed.

In addition, in the case that the key buffer 2084 is formed of avolatile memory, all of the keys within the buffer are erased when thepower of the recording and reproduction apparatus is turned off and,thereby, secure concealment becomes possible.

(Sixteenth Embodiment)

A recording and reproduction apparatus according to the sixteenthembodiment of the present invention can make a notification to the userof the timing of the time shift reproduction.

FIG. 41 is a configuration diagram of the recording and reproductionapparatus according to the sixteenth embodiment of the presentinvention. In the figure, the same symbols are attached to the same, orcorresponding, parts as in FIG. 33, of which the descriptions areomitted. In addition, a notification means 2091 is a means of making anotification of the operational condition of this recording andreproduction apparatus through sound, image or letter information.

In addition, FIG. 42 is a diagram for describing the operation of therecording and reproduction apparatus according to the presentembodiment. The operation of the recording and reproduction apparatusaccording to the sixteenth embodiment of the present invention that hasthe above described configuration is described in the following. Here,the capacity set in the recording buffer 2014 corresponds to 90 minutesof broadcast time in the same manner as in the twelfth embodiment andthe descriptions of the operations that overlap those in the twelfthembodiment are omitted so that only the points of difference aredescribed.

First, the case is considered wherein the user is viewing and listeningto copy prohibited content broadcast from the broadcast station as alive broadcast and the viewing and listening temporarily interrupted attime t for some reason. At this time, the user inputs commands via thecontrol input I/F 2015 so as to start up the recording and reproductionmeans 2012. Recording and reproduction means 2012 starts recording thecopy prohibited content in the recording buffer 2014 at a point in time(same as time t1) when the input from the control input I/F 2015 isreceived. Meanwhile, the recording and reproduction apparatus convertsto the “pause” condition.

The data of the copy prohibited content is recorded in the recordingbuffer 2014 in the same manner as in the operation of twelfth embodimentand when it becomes time t2, an alarm sound is issued to the user so asto draw the users attention that they must control the recording andreproduction apparatus. In the present embodiment time t2 is set at atime when the remaining amount of time (broadcast time unit) has elapsedafter the recording time t1 during which the data recorded in therecording buffer 2014 by the recording and reproduction means 2012 hasreached the set capacity and that is 5 minutes (broadcast time units) inthe present embodiment. Accordingly, time t2 completely becomes the(recording starting (pause starting) time +85 minutes (amount of copyprohibited content that is temporarily recorded in the recording buffer−5 minutes).

Due to the notification from the notification means 2091, the userinputs commands via the control input I/F 2015 so as to release thepause and to restart the viewing and listening of the copy prohibitedcontent. The point that differs from the condition before the pause isthe copy prohibited content that the user is viewing and listening to isreproduced in a time shift manner from the recording buffer 2014 insteadof being the live broadcast from the broadcast station.

In this case, the pause is effectuated from time t2 to time t1 and theuser's program viewing and listening completion time t6 is behind thecompletion time t4 of the actual broadcast by (t2−t1) minutes.

In addition, when a time shift reproduction is carried out in thisoperation starting from time t2, reproduction of the content that istemporarily recorded in the recording buffer 2014 is completed while theprogram is being broadcast from the broadcast station and during aperiod of time from this reproduction completion time t7 to the programviewing and listening completion time t6, data is recorded in andreproduced from the recording buffer 2014 and, at the same time, thereproduced program data is held in the recording buffer in the conditionwherein viewing and listening is impossible or is erased.

On the other hand, in the case that the user does not input any commandinto the control input I/F 2015 after time t2 has passed, at time t3when the data for the set time is completely recorded in the recordingbuffer 2014, the operation of temporarily recording data in therecording buffer 2014 is stopped and the time shift reproduction isforcibly started. In the present embodiment, time t3 corresponds to thistime, which is 5 minutes after time t2, wherein time t2 is the time whenthe notification means 2091 makes a notification. In this operation, theprogram is reproduced in a time shift manner with a delay of the gapbetween time t3 and time t1, which is the time when pause is started, sothat time t5, which is the time when the viewing and listening to theprogram by the user is completed, is behind time t4, which is the timewhen the actual broadcast is completed, by (t3−t1) minutes. In addition,the (t3−t1) minutes is the same length of time as of the recording timeof the copy prohibited content that is set in the recording buffer 2014at the beginning. Furthermore, the broadcast after time t3 is notrecorded in the recording buffer 2014. Accordingly, during a period oftime between time t8, which is the time when the time shift reproductionis forcibly completed, and time t5, which is the program viewing andlistening completion time, the user views and listens to another programthat is broadcast after the broadcast of the previous program hasalready been completed or time t8 that is the time when the time shiftreproduction is completed exactly becomes the user's viewing andlistening completion time.

That is to say, in the case that the time shift reproduction is onceforcibly started without the input of the command for the time shiftreproduction by the user after time t2 has passed, the user cannot viewor listen to the program, which had been being viewed and listened tobefore the pause, in a complete form after the pause is released.

As described above according to the present embodiment, the user can setthe time shift reproduction of the copy prohibited content to a desiredtime and the user can be encouraged to complete the implementation ofthe time shift reproduction before a predetermined period has elapsed inorder to protect the copyright of the copy prohibited content.

Here, though in the above described embodiment, an example using therecording buffer 2014 is described, the same effect can be gained byusing the ring buffer 2044 of the thirteenth embodiment in place of therecording buffer 2014. As for the operation of the case wherein the ringbuffer 2044 is used, the time shift reproduction for the set period oftime in the recording buffer that a ring buffer is carried out whereinthe reproduction is simultaneously carried out as recording of data inan overwriting manner is continued between time t4 and time t3 as shownby the one dotted chain line in FIG. 42. Here, the operation of the casewherein the overwriting operation is set to be prohibited at time t3becomes the same as the case of a forcible time shift reproductionimplementation of the above described ordinal recording buffer.

In addition, the configuration of the embodiment may be used by beingcombined with that of the fourteenth embodiment, which has already beendescribed.

Furthermore, though in each of the above described embodiments arecording and reproduction means wherein a recording apparatus and areproduction means are integrated according to the present invention isdescribed as carrying out recording in, and reproduction from, arecording buffer, the configuration of the present invention is notlimited to this but, rather, may be provided with only a recording meansthat carries out recording and a means of reproducing data from therecording buffer 2014 or the ring buffer 2044 may be separately providedas an external apparatus.

Furthermore, though in each of the above described embodiments theperiod of time of recording of the copy prohibited content, or the like,is measured as time information by counting the PCR packets within theMPEG stream of the content, time information is not limited to this but,rather, EPG may be used as another type of time information and the timeinformation may be measured in reference to the acquired EPG by carryingout an absolute time measurement by means of a timer providedseparately.

Furthermore, this time information may be measured in the recordingmedium 2013.

Furthermore, this time information may be measured within a device suchas an STB that inputs an MPEG stream to the recording and reproductionapparatus according to the embodiment of the present invention and maybe inputted together with the MPEG stream. Furthermore, these types oftime information may include the broadcast starting time, and the like,of the content that becomes the object of temporary recording.

Furthermore, though in each of the above described embodiments copyprohibited content is described as comprising data that is notpermitted, even one time, to be copied, copy prohibited content of thepresent invention is not limited to this but, rather, content thatcomprises data that is allowed to be copied only one time may be theobject of the invention. In summary, it is possible for the presentinvention to use any data, as long as it is prohibited from being copiedor predetermined restrictions are applied to it.

Here, the present specification also describes an invention concerning areproduction apparatus characterized by comprising: a control means ofcontrolling the encrypted data, which is recorded on a disk by the abovedescribed recording apparatus of the present invention, to bereproduced; a reproduction means controlled by said control means ofreproducing said data and a decryption means of decrypting saidreproduced data and of sending it to an interface; wherein said controlmeans controls said recording means to reproduce said copy permissioninformation; wherein said decryption means generates first informationthat includes at least either of said device unique key or said copypermission information; wherein said decryption means uses saidrecording unit information and generates a content key that isinformation gained by decrypting said first information; and whereinsaid decryption means decrypts said data by using said content key.

Furthermore, the present specification also describes an inventionconcerning a reproduction apparatus characterized by comprising: acontrol means of controlling the encrypted data, which is recorded on adisk by the above described recording apparatus of the presentinvention, to be reproduced; a reproduction means controlled by saidcontrol means of reproducing said data; and a decryption means ofdecrypting said reproduced data and of sending it to an interface;wherein said control means controls said recording means to reproducesaid encrypted title key; and wherein said decryption means decryptssaid encrypted title key by using said device unique key.

Furthermore, the present specification describes an invention concerninga reproduction apparatus characterized by comprising: a control means ofcontrolling the encrypted data, which is recorded on a disk by the abovedescribed recording apparatus of the present invention, to bereproduced; a reproduction means controlled by said control means ofreproducing said data; and a decryption means of decrypting saidreproduced data and of sending it to an interface; wherein saiddecryption means decrypts said data by using said title key.

Furthermore, the present specification describes an invention concerninga reproduction apparatus characterized by comprising; a control means ofcontrolling the encrypted data, which is recorded on a disk by the abovedescribed recording apparatus of the present invention, to bereproduced; a reproduction means controlled by said control means ofreproducing said data; and a decryption means of decrypting saidreproduced data and of sending it to an interface; wherein said controlmeans controls said recording means to reproduce said encrypted titlekey; wherein said decryption means decrypts said reproduced title key byusing said device unique key; said decryption means generates thirdinformation that includes said title key; wherein said decryption meansgenerates a content key that is information gained by decrypting saidthird information by using recording unit information that is a numeraland/or a symbol specific to the recording block based on a recordingunit that is the minimum unit for said control means to sequentiallyaccess said recording means; and wherein said decryption means decryptssaid data by using said content key.

Furthermore, the present specification also describes an inventionconcerning a reproduction apparatus characterized by comprising: acontrol means of controlling the encrypted data, which is recorded on adisk by the above described recording apparatus of the presentinvention, to be reproduced; a reproduction means controlled by saidcontrol means of reproducing said data; and a decryption means ofdecrypting said reproduced data and of sending it to an interface;wherein said decryption means decrypts said data by using said copypermission information.

Furthermore, the present specification describes an invention concerninga reproduction apparatus characterized by comprising; a control means ofcontrolling the encrypted data, which is recorded on a disk by the abovedescribed recording apparatus of the present invention, to bereproduced; a reproduction means controlled by said control means ofreproducing said data; and a decryption means of decrypting saidreproduced data and of sending it to an interface; wherein said controlmeans controls said recording means to reproduce said encrypted titlekey; wherein said decryption means decrypts said reproduced title key byusing said device unique key; wherein said control means controls saidrecording means to reproduce said copy permission information; whereinsaid decryption means generates second information that includes atleast either said title key or said copy permission information; whereinsaid decryption means generates a content key that is information gainedby decrypting said second information by using recording unitinformation that is a numeral and/or a symbol specific to a recordingblock corresponding to a recording unit that is the minimum unit forsaid control means to sequentially access said recording means; andwherein said decryption means decrypts said data by using said contentkey.

Furthermore, the present specification describes an invention concerninga reproduction apparatus characterized by comprising; a control means ofcontrolling the encrypted data, which is recorded on a disk by the abovedescribed recording apparatus of the present invention, to bereproduced; a reproduction means controlled by said control means ofreproducing said data; and a decryption means of decrypting saidreproduced data and of sending it to an interface; wherein said controlmeans controls said recording means to reproduce said copy permissioninformation; and wherein said decryption means decrypts said data byusing said reproduced copy permission information.

Furthermore, the present specification also describes an inventionconcerning a medium that holds a program and/or data for allowing acomputer to implement the entirety of, or a part of, the functions ofthe entirety of, or a part of, the above described present invention,wherein said functions are implemented by said program and/or data,which is readable or has been read out by the computer, working incooperation with said computer.

Furthermore, the present specification also describes an inventionconcerning an information assembly that is a program and/or data forallowing a computer to implement the entirety of, or a part of, thefunctions of the entirety of, or a part of, the above described presentinvention, wherein said functions are implemented by said program and/ordata, which is readable or has been read out by the computer, working incooperation with said computer.

Furthermore, data includes data structure, data format, data types, andthe like.

Furthermore, a medium includes a recording medium such as a ROM, atransmission medium such as the Internet and a transmission medium suchas light, radio waves and sound waves.

Furthermore, a medium that holds a program and/or data includes, forexample, a recording medium in which a program and/or data is recorded,a transmission medium for transmitting a program and/or data, and thelike.

Furthermore, to be able to be processed by a computer includes, forexample, to be readable by a computer in the case of a recording mediumsuch as a ROM and includes that a program and/or data that becomes theobject of transmission is able to be handled by a computer as a resultof transmission.

Furthermore, an information assembly includes software such as, forexample, a program and/or data.

Furthermore, as described above, the configuration of the presentinvention may be implemented in a software manner or may be implementedin a hardware manner.

INDUSTRIAL APPLICABILITY

As is clear from the above description, the present invention canprovide a recording apparatus and a reproduction apparatus that canprotect copyrights in the case that data that requires copyrightprotection is recorded and/or in the case that data that requirescopyright protection is reproduced.

In addition, the present invention can provide a data processingapparatus that protects the copyright when shifting data that isprohibited from being copied to, or when copying data that is prohibitedfrom being copied in, another recording medium, a recording andreproduction apparatus for recording, or for reproducing whilerecording, the data from this data processing apparatus, an encrypteddata decrypting and recording apparatus system for backing up data whileprotecting the copyright as well as a decrypting and recordingapparatus, a recording apparatus and data transmission apparatus fortransmitting data while protecting the copyright.

In addition, the present invention can provide a recording apparatus anda recording and reproduction apparatus that can carry out a time shiftreproduction of a broadcast program, and the like, that is prohibitedfrom being copied in a manner such that infringement of the copyright isavoided.

1. A data processing apparatus comprising at least move means of movingdata that is recorded in a recording medium for recording data toanother recording apparatus, characterized in that, in the case thatdata that is attempted to be moved by said move means is copy prohibiteddata prohibited from being copied, the copy prohibited data is encryptedby using an encryption key specific to said data processing apparatuswhen at least being outputted from said data processing apparatus.
 2. Adata processing apparatus comprising at least copying means of copyingdata that is recorded on a recording medium for recording data intoanother recording apparatus, characterized in that, in the case thatdata that is attempted to be copied by said copying means is copypermission information that is prohibited from being copied, the copyprohibited data is encrypted by using an encryption key specific to saiddata processing apparatus when at least being outputted from said dataprocessing apparatus.
 3. A data processing apparatus according to claim1 or 2, characterized by further comprising encryption means ofencrypting said copy prohibited data by using said encryption key.
 4. Adata processing apparatus according to any of claims 1 or 2,characterized by further comprising a reproduction means of decryption,by using said encryption key, said copy prohibited data encrypted usingsaid encryption key and of reproducing said copy prohibited data.
 5. Adata processing apparatus according to claim 4, characterized in that:said reproduction means is means of reproducing said copy prohibiteddata at a rate required at the time of viewing and listening by theuser; storage means of storing said copy prohibited data that has beentransmitted at a rate faster than said rate that is required at the timeof viewing and listening by the user in the case that said copyprohibited data encrypted using said encryption key is transmitted at arate faster than said rate required at the time of viewing and listeningby the user from said other recording apparatus is provided; and saidreproduction means can reproduce said copy prohibited data stored insaid storage means or data stored in said storage means in advance atthe time when said storage means stores said copy prohibited data fromsaid other recording apparatus.
 6. A data processing apparatus accordingto any of claims 1 or 2, characterized in that: said other recordingapparatus is an apparatus that can record data in a second recordingmedium; judgment means of judging whether or not said second recordingmedium is a recording medium corresponding to said data processingapparatus is further provided; and said move means or said copying meansmoves or copies said copy prohibited data in the case that said secondrecording medium is judged to be a recording medium corresponding tosaid data processing apparatus by said judgment means.
 7. A dataprocessing apparatus according to any of claims 1 or 2, characterized inthat: said other recording apparatus is an apparatus that can recorddata in a second recording medium; judgment means of judging whether ornot said other recording apparatus is an apparatus corresponding to saiddata processing apparatus is further provided; and said move means orsaid copying means moves or copies said copy prohibited data in the casethat said other recording apparatus is an apparatus corresponding tosaid data processing apparatus by said judgment means.
 8. A dataprocessing apparatus according to any of claims 1 or 2, characterized inthat said move means or said copying means outputs said copy prohibiteddata as data that can be copied only once when said copy prohibited datais moved or is copied.
 9. A recording and reproduction apparatus,characterized by comprising a recording means of recording said copyprohibited data that is encrypted using said encryption key from a dataprocessing apparatus according to any of claims 1 or 2 in a secondrecording medium.
 10. A recording and reproduction apparatus,characterized by comprising: a recording means of recording said copyprohibited data that is encrypted using said encryption key from a dataprocessing apparatus according to claim 4 in a second recording medium;and a transmission means of transmitting said copy prohibited data thatis recorded in said second recording medium and that is encrypted usingsaid encryption key to said data processing apparatus while stillencrypted using said encryption key.
 11. A recording and reproductionapparatus, characterized by comprising: a recording means of recordingsaid copy prohibited data that is encrypted using said encryption keyfrom a data processing apparatus according to claim 6 in said secondrecording medium; and a transmission means of transmitting said copyprohibited data that is recorded in said second recording medium andthat is encrypted using said encryption key to said data processingapparatus while still encrypted using said encryption key.
 12. Arecording and reproduction apparatus, characterized by comprising: arecording means of recording said copy prohibited data encrypted usingsaid encryption key from a data processing apparatus according to any ofclaims 1 or 2 in a second recording medium; and decryption andreproduction means of decrypting, by using said encryption key, saidcopy prohibited data that is recorded in said second recording mediumand that is encrypted using said encryption key and of reproducing saidcopy prohibited data.
 13. A recording and reproduction apparatusaccording to claim 12, characterized by further comprising: keyreproduction means of reproducing an encrypted key recording mediumwherein said encryption key is recorded; and key storage means ofstoring said encryption key reproduced by said key reproduction means,wherein said decryption and reproduction means reproduces said copyprohibited data by utilizing said encryption key stored by said keystorage means.
 14. A recording and reproduction apparatus according toclaim 12, characterized by further comprising a reception means ofreceiving said encryption key that is transmitted from said dataprocessing apparatus, wherein said decryption and reproduction meansreproduces said copy prohibited data by utilizing said encryption keyreceived by said reception means.
 15. A data processing apparatus,characterized by comprising at least move means of moving data that isrecorded in a recording medium for recording data to another recordingapparatus as data in a format that can be decrypted in the otherrecording apparatus, wherein data that is attempted to be moved by saidmove means is copy prohibited data that is prohibited from being copied.16. A data processing apparatus, characterized by comprising at leastcopying means of copying data that is recorded in a recording medium forrecording data in another recording apparatus as data in a format thatcan be decrypted in the other recording apparatus, wherein data that isattempted to be copied by said copying means is copy prohibited datathat is prohibited from being copied.
 17. A data processing apparatusaccording to claim 15 or 16, characterized in that the data in a formatthat can be decrypted in said other recording apparatus means plainsentence data, data that is encrypted using a key specific to said otherrecording apparatus or data that is encrypted using a key attached to asecond recording medium in said other recording apparatus.
 18. A dataprocessing apparatus according to claim 17, characterized in that thedata in a format that can be decrypted in said other recording apparatusis also data in a format used in said other recording apparatus.
 19. Adata processing apparatus according to any of claims 15 or 16,characterized in that: said other recording apparatus is an apparatusthat can record data in said recording medium; judgment means of judgingwhether or not said second recording medium corresponds to said dataprocessing apparatus is further provided; and said move means or saidcopying means moves or copies said copy prohibited data in the case thatsaid second recording medium is judged to be a recording mediumcorresponding to said data processing apparatus according to saidjudgment means.
 20. A data processing apparatus according to claim 19,characterized in that: said judgment means carries out said judgment byusing said key in the case that a key indicating that said secondrecording medium is a recording medium corresponding to said dataprocessing apparatus is attached to said second recording medium;encryption means of encrypting said copy prohibited data by using saidkey in the case that said second recording medium is judged to be arecording medium corresponding to said data processing apparatus by saidjudgment means is further provided; and said move means or said copyingmeans moves or copies said encrypted copy prohibited data.
 21. A dataprocessing apparatus according to any of claims 15 or 16, characterizedin that: said other recording apparatus is an apparatus that can recorddata in a second recording medium; judgment means of judging whether ornot said other recording apparatus is an apparatus corresponding to saiddata processing apparatus is further provided; and said move means orsaid copying means moves or copies said copy prohibited data in the casethat said other recording apparatus is judged to be an apparatuscorresponding to said data processing apparatus by said judgment means.22. A data processing apparatus according to claim 21, characterized inthat: in the case that said judgment means has a key that indicates thatsaid other recording apparatus is an apparatus corresponding to saiddata processing apparatus, said judgment means carries out said judgmentby using said key; encryption means of encrypting said copy prohibiteddata by using said key, in the case that said other recording apparatusis judged to be an apparatus corresponding to said data processingapparatus by said judgment means, is further provided; and said movemeans or said copying means moves or copies said encrypted copyprohibited data.
 23. A data processing apparatus according to any ofclaims 15 or 16, characterized in that said move means or said copyingmeans outputs said copy prohibited data as data that can be copied onlyonce when said copy prohibited data is moved or copied.
 24. A recordingand reproduction apparatus for recording said copy prohibited data, froma data processing apparatus according to claim 15 or 16, in a secondrecording medium and for reproducing said copy prohibited data from saidsecond recording medium, wherein said copy prohibited data is plainsentence data, and wherein said recording and reproduction apparatus ischaracterized by comprising: encryption means of encrypting said copyprohibited data by using an encryption key attached to said secondrecording medium or by using an encryption key specific to saidrecording and reproduction apparatus; recording means of recording saidcopy prohibited data encrypted by said encryption means in said secondrecording medium; and reproduction means of decrypting said encryptedcopy prohibited data that is recorded in said second recording medium byutilizing said key so as to reproduce said copy prohibited data.
 25. Arecording and reproduction apparatus for recording said copy prohibiteddata, from a data processing apparatus according to claim 15 or 16, in asecond recording medium and for reproducing said copy prohibited datafrom said second recording medium, wherein said copy prohibited data isdata encrypted by a key specific to said recording and reproductionapparatus or data encrypted by using a key attached to said secondrecording medium, wherein said recording and reproduction apparatus ischaracterized by comprising: recording means of recording said encryptedcopy prohibited data in said second recording medium; and reproductionmeans of decrypting said encrypted copy prohibited data that is recordedin said second recording medium by utilizing said key so as to reproducesaid copy prohibited data.
 26. A data processing apparatus according toany of claims 1, 2, 15 or 16, characterized by further comprising a feeimposition information transmission means of transmitting fee impositioninformation with respect to move or copying of said data to a managementapparatus for managing said data processing apparatus when said movemeans carries out the move of said data or when said copying meanscarries out the copying of said data.
 27. A data processing apparatusaccording to any of claims 1, 2, 15 or 16 characterized in that saidmove means moves said copy prohibited data to, or said copying meanscopies said copy prohibited data into, said other recording apparatuswhen at least a management apparatus, which has the ability of imposinga fee on the move or on the copying of said copy prohibited data, isconfirmed to be connected to an interface to which said data processingapparatus and said other recording apparatus are connected.
 28. Anencrypted data decrypting and recording apparatus system characterizedby comprising: a plurality of recording apparatuses that respectivelyrecord encrypted copy prohibited data, of which the content isidentical, that is prohibited from being copied; and a decrypting andrecording apparatus having decryption means of decrypting said encryptedcopy prohibited data that is outputted from said plurality of recordingapparatuses and a recording means of recording encrypted, orunencrypted, copy prohibited data, of which the content is identical tosaid copy prohibited data.
 29. A decrypting and recording apparatus,characterized by comprising: decryption means of decrypting encryptedcopy prohibited data, which is prohibited from being copied and which isoutputted from a plurality of recording apparatuses in which saidencrypted copy prohibited data, of which the content is identical, isrespectively recorded; and recording means of recording encrypted, orunencrypted, copy prohibited data, of which the content is identical tothat of said copy prohibited data.
 30. A recording apparatus,characterized by being one of a plurality of recording apparatuses thatrespectively record encrypted copy prohibited data, of which the contentis identical, that is prohibited from being copied, wherein saidrecording apparatus comprises a recording means of recording saidencrypted copy prohibited data and an output means of outputting saidencrypted copy prohibited data that is recorded in said recording means,and wherein said encrypted copy prohibited data outputted from saidoutput means is data that can only be decrypted in a decrypting andrecording apparatus having at least a decryption means of decryptingsaid encrypted copy prohibited data.
 31. A data transmission apparatuscharacterized by comprising transmission means of transmitting a streamformed of a plurality of pieces of data, wherein each of said pieces ofdata in said stream, or within each of blocks forming said stream, isdata that cannot be reproduced unless the piece of data chronologicallypositioned one position before said data is reproduced, and wherein saidtransmission means transmits each piece of said data, of data in saidstream, or each of the blocks forming said stream, in the order of fromthe rear toward the head in a chronological manner.